| League Transactions |
|---|
 | Offseason 1988: Dennis Swilley has retired. |
| Offseason 1988: Wesley Walker has retired. |
 | Offseason 1988: Mike Douglass has retired. |
| Offseason 1988: Rob Carpenter has retired. |
 | Offseason 1988: Bill Bryan has retired. |
 | Offseason 1988: Ronnie Lee has retired. |
 | Offseason 1988: Eric Harris has retired. |
| Offseason 1988: Joe Klecko has retired. |
 | Offseason 1988: Billy Johnson has retired. |
| Offseason 1988: Doug Smith has retired. |
| Offseason 1988: James Wilder has retired. |
 | Offseason 1988: Charles Jackson has retired. |
| Offseason 1988: Matt Cavanaugh has retired. |
| Offseason 1988: Darrin Nelson has retired. |
 | Offseason 1988: George Rogers has retired. |
| Offseason 1988: Matt Suhey has retired. |
| Offseason 1988: Mike Kenn has retired. |
 | Offseason 1988: Larry Moriarty has retired. |
 | Offseason 1988: Joe Cribbs has retired. |
| Preseason Week 1, 1988: The Monarchs trade a Falcons 1988 2nd Round Pick, a Falcons 1988 3rd Round Pick, a Monarchs 1988 6th Round Pick to the Seahawks for a Seahawks 1988 2nd Round Pick. |
 | Preseason Week 1, 1988: The Monarchs trade a Falcons 1988 2nd Round Pick, a Falcons 1988 3rd Round Pick, a Monarchs 1988 6th Round Pick to the Seahawks for a Seahawks 1988 2nd Round Pick. |
 | Preseason Week 1, 1988: The Lions trade a Bengals 1988 1st Round Pick, a Lions 1989 2nd Round Pick to the Colts for a Colts 1988 1st Round Pick. |
 | Preseason Week 1, 1988: The Lions trade a Bengals 1988 1st Round Pick, a Lions 1989 2nd Round Pick to the Colts for a Colts 1988 1st Round Pick. |
| Free Agency 1988: The Falcons trade a Falcons 1991 1st Round Pick to the Ravens for future considerations. |
| Free Agency 1988: The Falcons trade a Falcons 1991 1st Round Pick to the Ravens for future considerations. |
| Free Agency 1988: The Vikings trade a Vikings 1988 1st Round Pick to the Ravens for a Ravens 1988 2nd Round Pick, a Ravens 1988 3rd Round Pick, a Ravens 1989 1st Round Pick, a Ravens 1990 3rd Round Pick, a Ravens 1990 4th Round Pick, a Falcons 1991 1st Round Pick, a Ravens 1991 4th Round Pick, a Ravens 1991 5th Round Pick, a Ravens 1991 6th Round Pick, a Ravens 1991 7th Round Pick. |
| Free Agency 1988: The Vikings trade a Vikings 1988 1st Round Pick to the Ravens for a Ravens 1988 2nd Round Pick, a Ravens 1988 3rd Round Pick, a Ravens 1989 1st Round Pick, a Ravens 1990 3rd Round Pick, a Ravens 1990 4th Round Pick, a Falcons 1991 1st Round Pick, a Ravens 1991 4th Round Pick, a Ravens 1991 5th Round Pick, a Ravens 1991 6th Round Pick, a Ravens 1991 7th Round Pick. |
| Free Agency 1988: The Seahawks trade a Seahawks 1988 7th Round Pick to the Monarchs for John Kasay. |
| Free Agency 1988: The Seahawks trade a Seahawks 1988 7th Round Pick to the Monarchs for John Kasay. |
 | Free Agency 1988: The Giants trade a Giants 1988 7th Round Pick to the Packers for a Packers 1989 6th Round Pick. |
 | Free Agency 1988: The Giants trade a Giants 1988 7th Round Pick to the Packers for a Packers 1989 6th Round Pick. |
| Free Agency 1988: The Giants trade Jack Linn, Mike Arthur and a Giants 1989 7th Round Pick to the Monarchs for Leonard Mitchell, Dan Turk. |
| Free Agency 1988: The Giants trade Jack Linn, Mike Arthur and a Giants 1989 7th Round Pick to the Monarchs for Leonard Mitchell, Dan Turk. |
 | Free Agency 1988: The Dolphins trade a Dolphins 1991 7th Round Pick to the Bengals for Gary Anderson K. |
 | Free Agency 1988: The Dolphins trade a Dolphins 1991 7th Round Pick to the Bengals for Gary Anderson K. |
| Free Agency 1988: The Ravens trade a Falcons 1990 1st Round Pick to the Monarchs for Kirk Lowdermilk. |
| Free Agency 1988: The Ravens trade a Falcons 1990 1st Round Pick to the Monarchs for Kirk Lowdermilk. |
| Free Agency 1988: The Ravens trade Brad Benson to the Cardinals for a Cardinals 1990 3rd Round Pick. |
| Free Agency 1988: The Ravens trade Brad Benson to the Cardinals for a Cardinals 1990 3rd Round Pick. |
| Free Agency 1988: The Seahawks trade a Seahawks 1989 3rd Round Pick, a Seahawks 1989 5th Round Pick to the Monarchs for Doug Smith DT. |
| Free Agency 1988: The Seahawks trade a Seahawks 1989 3rd Round Pick, a Seahawks 1989 5th Round Pick to the Monarchs for Doug Smith DT. |
| Free Agency 1988: The Cardinals trade a Cardinals 1990 2nd Round Pick to the Monarchs for Jim Ritcher and a Monarchs 1989 5th Round Pick. |
| Free Agency 1988: The Cardinals trade a Cardinals 1990 2nd Round Pick to the Monarchs for Jim Ritcher and a Monarchs 1989 5th Round Pick. |
| Free Agency 1988: The Monarchs trade Dennis Roland to the Bengals for a Bengals 1991 6th Round Pick. |
| Free Agency 1988: The Monarchs trade Dennis Roland to the Bengals for a Bengals 1991 6th Round Pick. |
| Free Agency 1988: The Seahawks trade future considerations to the Ravens for Wendell Cason. |
| Free Agency 1988: The Seahawks trade future considerations to the Ravens for Wendell Cason. |
| Training Camps 1988: The Miami Dolphins have signed Bobby Hamilton - DE. |
| Training Camps 1988: The Miami Dolphins have signed Eric Martin - WR. |
| Training Camps 1988: The Miami Dolphins have signed Daryl Gardener - DT. |
| Training Camps 1988: The Miami Dolphins have signed Mark Lee - CB. |
| Training Camps 1988: The Miami Dolphins have signed Jeremy Kapinos - P. |
| Training Camps 1988: The Seattle Seahawks have signed Lionel Manuel - WR. |
| Training Camps 1988: The Seattle Seahawks have signed Randy McMillan - FB. |
| Training Camps 1988: The Seattle Seahawks have signed Willie Tullis - CB. |
| Training Camps 1988: The Seattle Seahawks have signed Sean Landeta - P. |
| Training Camps 1988: The Seattle Seahawks have signed Bruce McNorton - CB. |
| Training Camps 1988: The Seattle Seahawks have signed Jon Borchardt - G. |
| Training Camps 1988: The Seattle Seahawks have signed Charles Romes - CB. |
| Training Camps 1988: The Seattle Seahawks have signed Marty Lyons - DE. |
| Training Camps 1988: The Seattle Seahawks have signed John Stallworth - WR. |
| Training Camps 1988: The Seattle Seahawks have signed Ken O'Brien - QB. |
| Training Camps 1988: The Seattle Seahawks have signed Lou D'Agostino - FB. |
| Training Camps 1988: The Seattle Seahawks have signed Dan Ross - TE. |
| Training Camps 1988: The Seattle Seahawks have signed Tony Elliott - DT. |
| Training Camps 1988: The Seattle Seahawks have signed Chris Washington - LB. |
| Training Camps 1988: The Seattle Seahawks have signed Steve Strachan - RB. |
| Training Camps 1988: The Ravens trade future considerations to the Seahawks for Chris Washington. |
| Training Camps 1988: The Ravens trade future considerations to the Seahawks for Chris Washington. |
| Training Camps 1988: The London Monarchs have signed William Perry - DT. |
| Training Camps 1988: The London Monarchs have signed Rick Donnelly - P. |
| Training Camps 1988: The London Monarchs have signed Calvin Daniels - LB. |
| Training Camps 1988: The London Monarchs have signed Rich Milot - LB. |
| Training Camps 1988: The London Monarchs have signed Tim Barnett - WR. |
| Training Camps 1988: The London Monarchs have signed Kavika Pittman - DE. |
| Training Camps 1988: The London Monarchs have signed Pete Mandley - WR. |
| Training Camps 1988: The London Monarchs have signed Lee Williams - DE. |
| Training Camps 1988: The London Monarchs have signed Deon Anderson - FB. |
| Training Camps 1988: The London Monarchs have signed Jake Nordin - TE. |
| Training Camps 1988: The London Monarchs have signed James Anderson - LB. |
| Training Camps 1988: The London Monarchs have signed Gerald Willhite - RB. |
| Training Camps 1988: The London Monarchs have signed Edgar Jones - LB. |
| Training Camps 1988: The London Monarchs have signed Jeff Davis - LB. |
| Training Camps 1988: The London Monarchs have signed Eric Williams FS - FS. |
| Training Camps 1988: The London Monarchs have signed Reagan Mauia - RB. |
| Training Camps 1988: The London Monarchs have signed Marcus Keyes - DT. |
| Training Camps 1988: The London Monarchs have signed Roynell Young - CB. |
| Training Camps 1988: The Baltimore Ravens have signed Al Del Greco - K. |
| Training Camps 1988: The Baltimore Ravens have signed Rich Camarillo - P. |
| Training Camps 1988: The Baltimore Ravens have signed Mark Nichols - WR. |
| Training Camps 1988: The Baltimore Ravens have signed Luis Sharpe - T. |
| Training Camps 1988: The Baltimore Ravens have signed Reggie Wilkes - LB. |
| Training Camps 1988: The Baltimore Ravens have signed Alex Molden - FS. |
| Training Camps 1988: The Baltimore Ravens have signed Andy Headen - LB. |
| Training Camps 1988: The Baltimore Ravens have signed Tim Newton - DT. |
| Training Camps 1988: The Baltimore Ravens have signed Greg Meisner - DT. |
| Training Camps 1988: The Baltimore Ravens have signed James Wilder - RB. |
| Training Camps 1988: The New York Jets have signed Darren Comeaux - LB. |
| Training Camps 1988: The New York Jets have signed Ali Haji-Sheikh - K. |
| Training Camps 1988: The New York Jets have signed John Swain - CB. |
| Training Camps 1988: The New York Jets have signed John Spagnola - TE. |
| Training Camps 1988: The New York Jets have signed Cedric Jones - WR. |
| Training Camps 1988: The New York Jets have signed Walter Stanley - WR. |
| Training Camps 1988: The New York Jets have signed Mickey Shuler - TE. |
| Training Camps 1988: The New York Jets have signed Steve Nelson - LB. |
| Training Camps 1988: The New York Jets have signed David Galloway - DT. |
| Training Camps 1988: The New York Jets have signed Fredd Young - LB. |
| Training Camps 1988: The New York Jets have signed Malcom Barnwell - WR. |
| Training Camps 1988: The New York Jets have signed Anthony Dorsett - FS. |
| Training Camps 1988: The New York Jets have signed Evan Cooper - CB. |
| Training Camps 1988: The New York Jets have signed Rich Moran - G. |
| Training Camps 1988: The New York Jets have signed Earl Ferrell - FB. |
| Training Camps 1988: The New York Jets have signed Kevin Dogins - G. |
| Training Camps 1988: The New York Jets have signed Cedric Mack - CB. |
| Training Camps 1988: The New York Jets have signed Walt Arnold - TE. |
| Training Camps 1988: The New York Jets have signed Mike Walter - LB. |
| Training Camps 1988: The Kansas City Chiefs have signed Tyrone Williams - CB. |
| Training Camps 1988: The Kansas City Chiefs have signed Jeff Griffin - CB. |
| Training Camps 1988: The Kansas City Chiefs have signed Ron Solt - G. |
| Training Camps 1988: The Kansas City Chiefs have signed Doug Martin - DE. |
| Training Camps 1988: The Kansas City Chiefs have signed Howard Richards - T. |
| Training Camps 1988: The Kansas City Chiefs have signed Carlos Carson - WR. |
| Training Camps 1988: The Kansas City Chiefs have signed Dave Huffman - T. |
| Training Camps 1988: The Kansas City Chiefs have signed Scott Studwell - LB. |
| Training Camps 1988: The Kansas City Chiefs have signed Cody Risien - T. |
| Training Camps 1988: The Kansas City Chiefs have signed James Jones - RB. |
| Training Camps 1988: The Kansas City Chiefs have signed Jim Leonard - C. |
| Training Camps 1988: The Kansas City Chiefs have signed Matt Moore - QB. |
| Training Camps 1988: The Kansas City Chiefs have signed Barry Bennett - DT. |
| Training Camps 1988: The Kansas City Chiefs have signed Micheal Spurlock - WR. |
| Training Camps 1988: The Kansas City Chiefs have signed Trumaine Johnson - WR. |
 | Training Camps 1988: The Oakland Raiders have signed Albert Lewis - CB. |
| Training Camps 1988: The Oakland Raiders have signed Shawn Miller - DT. |
| Training Camps 1988: The Oakland Raiders have signed Don Wilson - FS. |
| Training Camps 1988: The Oakland Raiders have signed Bobby Hebert - QB. |
| Training Camps 1988: The Oakland Raiders have signed Mercury Hayes - WR. |
| Training Camps 1988: The Oakland Raiders have signed Tony Hill - WR. |
| Training Camps 1988: The Oakland Raiders have signed Bruce Kozerski - C. |
| Training Camps 1988: The Oakland Raiders have signed Ozzie Newsome - TE. |
| Training Camps 1988: The Oakland Raiders have signed Mark Dennard - C. |
| Training Camps 1988: The Oakland Raiders have signed Mike Saxon II - P. |
| Training Camps 1988: The Oakland Raiders have signed Freddie Scott Jr. - WR. |
| Training Camps 1988: The Oakland Raiders have signed Tony Franklin - K. |
| Training Camps 1988: The Oakland Raiders have signed Reggie Camp - DE. |
| Training Camps 1988: The Buffalo Bills have signed Elbert Foules - SS. |
| Training Camps 1988: The Buffalo Bills have signed Sean Jones - DE. |
| Training Camps 1988: The Buffalo Bills have signed John Mobley - LB. |
| Training Camps 1988: The Buffalo Bills have signed Brian Walker - CB. |
| Training Camps 1988: The Buffalo Bills have signed Robert Brown - DE. |
| Training Camps 1988: The Buffalo Bills have signed Max Montoya - G. |
| Training Camps 1988: The Buffalo Bills have signed Shayne Edge - P. |
| Training Camps 1988: The Buffalo Bills have signed Ernie Conwell - TE. |
| Training Camps 1988: The Buffalo Bills have signed Reggie Kinlaw - DT. |
| Training Camps 1988: The Buffalo Bills have signed Dave Wilson - QB. |
| Training Camps 1988: The Buffalo Bills have signed Dwight Stephenson - C. |
| Training Camps 1988: The Buffalo Bills have signed Frank Hawkins - FB. |
| Training Camps 1988: The Cincinnati Bengals have signed Fred Marion - FS. |
| Training Camps 1988: The Cincinnati Bengals have signed Mike Richardson - CB. |
| Training Camps 1988: The Cincinnati Bengals have signed Simon Fletcher - DE. |
| Training Camps 1988: The Cincinnati Bengals have signed Scott Case - SS. |
| Training Camps 1988: The Cincinnati Bengals have signed Jacob Green - DE. |
| Training Camps 1988: The Cincinnati Bengals have signed Kenny Hill - SS. |
| Training Camps 1988: The Cincinnati Bengals have signed Steve Kreider - WR. |
| Training Camps 1988: The Cincinnati Bengals have signed Ron Baker - G. |
| Training Camps 1988: The Cincinnati Bengals have signed Harvey Salem - T. |
| Training Camps 1988: The Cincinnati Bengals have signed Keith Dorney - T. |
| Training Camps 1988: The Cleveland Browns have signed Pat Beach - TE. |
| Training Camps 1988: The Cleveland Browns have signed Bill Johnson - RB. |
| Training Camps 1988: The Cleveland Browns have signed Terry Kinard - FS. |
| Training Camps 1988: The Cleveland Browns have signed David Hughes - FB. |
| Training Camps 1988: The Cleveland Browns have signed Robin Cole - LB. |
| Training Camps 1988: The Cleveland Browns have signed Tom Barndt - DT. |
| Training Camps 1988: The Cleveland Browns have signed Earl Holmes - LB. |
| Training Camps 1988: The Cleveland Browns have signed Jim Ryan - LB. |
| Training Camps 1988: The Ravens trade Tim Huffman to the Bengals for a Bengals 1989 5th Round Pick. |
| Training Camps 1988: The Ravens trade Tim Huffman to the Bengals for a Bengals 1989 5th Round Pick. |
| Training Camps 1988: The Ravens trade Chris Dieterich to the Chiefs for a Chiefs 1989 3rd Round Pick. |
| Training Camps 1988: The Ravens trade Chris Dieterich to the Chiefs for a Chiefs 1989 3rd Round Pick. |
| Training Camps 1988: The Oakland Raiders have signed Tony Nathan - RB. |
| Training Camps 1988: The Miami Dolphins have signed Jay Schroeder - QB. |
| Training Camps 1988: The Miami Dolphins have signed Earnest Jackson - RB. |
| Training Camps 1988: The Miami Dolphins have signed Kenny Jackson - WR. |
| Training Camps 1988: The Miami Dolphins have signed Tim Irwin - T. |
| Training Camps 1988: The Miami Dolphins have signed Charley Hannah - G. |
| Training Camps 1988: The Seattle Seahawks have signed Riki Ellison - LB. |
| Training Camps 1988: The London Monarchs have signed J.J. Jansen - TE. |
| Training Camps 1988: The London Monarchs have signed Rashad Barksdale - CB. |
| Training Camps 1988: The London Monarchs have signed Dana McLemore - FS. |
| Training Camps 1988: The London Monarchs have signed Eric Hipple - QB. |
| Training Camps 1988: The London Monarchs have signed John Grimsley - LB. |
| Training Camps 1988: The London Monarchs have released Doug Nussmeier - QB. |
| Training Camps 1988: The London Monarchs have released Gerald Willhite - RB. |
| Training Camps 1988: The London Monarchs have released Rob Selby - G. |
| Training Camps 1988: The London Monarchs have released Jake Nordin - TE. |
| Training Camps 1988: The London Monarchs have released Rich Milot - LB. |
| Training Camps 1988: The London Monarchs have signed Jason Rader - TE. |
| Training Camps 1988: The London Monarchs have signed Max Jean-Gilles - G. |
| Training Camps 1988: The New York Jets have signed Greg LaFleur - TE. |
| Training Camps 1988: The New York Jets have signed Dusty Zeigler - C. |
| Training Camps 1988: The New York Jets have signed Randy Wright - QB. |
| Training Camps 1988: The New York Jets have signed Ben Williams - DE. |
| Training Camps 1988: The New York Jets have released Greg LaFleur - TE. |
| Training Camps 1988: The Buffalo Bills have signed Johnny Hector - RB. |
| Training Camps 1988: The Cincinnati Bengals have signed Joe Fields - C. |
| Training Camps 1988: The Cincinnati Bengals have signed Mike Harden - CB. |
| Training Camps 1988: The Cincinnati Bengals have signed Phillip Daniels - DE. |
| Training Camps 1988: The Cincinnati Bengals have signed Greg LaFleur - TE. |
| Training Camps 1988: The Cincinnati Bengals have signed David Woodley - QB. |
| Training Camps 1988: The Cincinnati Bengals have signed Jerry Butler - WR. |
| Training Camps 1988: The Cincinnati Bengals have signed Lyle Blackwood - CB. |
| Training Camps 1988: The Cincinnati Bengals have signed DeRon Jenkins - FS. |
| Training Camps 1988: The New York Giants have signed Bobby Engram - WR. |
| Training Camps 1988: The New York Giants have signed Duane Clemons - DE. |
| Training Camps 1988: The New York Giants have signed Mark Duda - DT. |
| Training Camps 1988: The New York Giants have signed Martin Bayless - FS. |
| Training Camps 1988: The New York Giants have signed Kevin Brooks - DE. |
| Training Camps 1988: The New York Giants have signed Lionel James - RB. |
| Training Camps 1988: The New York Giants have signed Jerry Robinson - LB. |
| Training Camps 1988: The New York Giants have signed Mark Gastineau - DE. |
| Training Camps 1988: The New York Giants have signed John Hannah - G. |
| Training Camps 1988: The New York Giants have signed Harry Hamilton - FS. |
| Training Camps 1988: The New York Giants have signed Wade Wilson - QB. |
| Training Camps 1988: The New York Giants have signed Michael Bush - RB. |
| Training Camps 1988: The New York Giants have signed Eric Weems - WR. |
| Training Camps 1988: The New York Giants have signed Tim Jennings - CB. |
| Training Camps 1988: The New York Giants have signed Ray Farmer - LB. |
| Training Camps 1988: The New York Giants have signed Rick Bryan - DE. |
| Training Camps 1988: The New York Giants have signed Glenn Blackwood - SS. |
| Training Camps 1988: The New York Giants have signed Gary Anderson - RB. |
| Training Camps 1988: The New York Giants have signed Mel Owens - LB. |
| Training Camps 1988: The New York Giants have signed Paul Lankford - CB. |
| Training Camps 1988: The New York Giants have released Alvin Toles - LB. |
| Training Camps 1988: The New York Giants have released Greg Gaines - LB. |
| Training Camps 1988: The Indianapolis Colts have signed Curt Warner - RB. |
| Training Camps 1988: The Indianapolis Colts have signed Hokie Gajan - FB. |
| Training Camps 1988: The Indianapolis Colts have signed Rohn Stark - P. |
| Training Camps 1988: The Indianapolis Colts have signed Michael Carter - DT. |
| Training Camps 1988: The Indianapolis Colts have signed James Britt - FS. |
| Training Camps 1988: The Indianapolis Colts have signed Jim Jensen - WR. |
| Training Camps 1988: The Indianapolis Colts have signed Garin Veris - DE. |
| Training Camps 1988: The Indianapolis Colts have signed Rod Martin - LB. |
| Training Camps 1988: The Indianapolis Colts have signed Dwight Hicks - CB. |
| Training Camps 1988: The Atlanta Falcons have signed Frank Warren - DE. |
| Training Camps 1988: The Atlanta Falcons have signed John Michels - T. |
| Training Camps 1988: The Atlanta Falcons have signed Rick Parros - RB. |
| Training Camps 1988: The Atlanta Falcons have signed Jimmie Giles - TE. |
| Training Camps 1988: The Atlanta Falcons have signed Steve Bartkowski - QB. |
| Training Camps 1988: The Atlanta Falcons have signed Rich Tylski - G. |
| Training Camps 1988: The Atlanta Falcons have signed Fred Thomas - CB. |
| Training Camps 1988: The Atlanta Falcons have signed Bernard Holsey - DT. |
| Training Camps 1988: The Atlanta Falcons have signed Jim Arnold - P. |
| Training Camps 1988: The Atlanta Falcons have signed Vince Newsome - CB. |
| Training Camps 1988: The Atlanta Falcons have signed Tom Cousineau - LB. |
| Training Camps 1988: The Atlanta Falcons have signed Rick Donnalley - C. |
| Training Camps 1988: The Atlanta Falcons have signed Don Hasselbeck - TE. |
| Training Camps 1988: The Atlanta Falcons have signed Eric Williams - DE. |
| Training Camps 1988: The Atlanta Falcons have signed Don Fielder - DT. |
| Training Camps 1988: The Atlanta Falcons have signed Matt Suhey - FB. |
| Training Camps 1988: The Atlanta Falcons have signed George Rogers - RB. |
| Training Camps 1988: The Tampa Bay Buccaneers have signed Buford McGee - RB. |
| Training Camps 1988: The Tampa Bay Buccaneers have signed Conrad Hamilton - SS. |
| Training Camps 1988: The Tampa Bay Buccaneers have signed Elvis Patterson - CB. |
| Training Camps 1988: The Tampa Bay Buccaneers have released A.J. Greene - SS. |
| Training Camps 1988: The Chicago Cardinals have signed Quentin Moses - DE. |
| Training Camps 1988: The Chicago Cardinals have signed Lawrence Phillips - RB. |
| Training Camps 1988: The Chicago Cardinals have signed Ken Clarke - DT. |
| Training Camps 1988: The Chicago Cardinals have signed Greg Estandia - TE. |
| Training Camps 1988: The Chicago Cardinals have signed Brian Robison - DE. |
| Training Camps 1988: The Chicago Cardinals have signed John Thornton - DT. |
| Training Camps 1988: The Chicago Cardinals have signed Manny Lawson - LB. |
| Training Camps 1988: The Chicago Cardinals have signed Scott Garnett - DT. |
| Training Camps 1988: The Chicago Cardinals have signed Wayne Wilson - FB. |
| Training Camps 1988: The Chicago Cardinals have signed Jim Morrissey - LB. |
| Training Camps 1988: The Chicago Cardinals have signed Bryan Hinkle - LB. |
| Training Camps 1988: The Chicago Cardinals have signed Morten Andersen - K. |
| Training Camps 1988: The Chicago Cardinals have signed Alvin Hall - CB. |
| Training Camps 1988: The Chicago Cardinals have signed Ken Reeves - T. |
| Training Camps 1988: The Chicago Cardinals have signed Russ Grimm - G. |
| Training Camps 1988: The Chicago Cardinals have signed Guy Bingham - C. |
| Training Camps 1988: The Chicago Cardinals have signed Mel Agee - DE. |
| Training Camps 1988: The Chicago Cardinals have signed Jonathan Hayes - TE. |
| Training Camps 1988: The Chicago Cardinals have signed Ken Ruettgers - T. |
| Training Camps 1988: The Chicago Cardinals have released Greg Estandia - TE. |
| Training Camps 1988: The Chicago Cardinals have released Wayne Wilson - FB. |
| Training Camps 1988: The Chicago Cardinals have released Paul Farren - T. |
| Training Camps 1988: The Chicago Cardinals have released Mark Cooper - G. |
| Training Camps 1988: The Chicago Cardinals have signed Joe Cribbs - RB. |
| Training Camps 1988: The Green Bay Packers have signed Roy Green - WR. |
| Training Camps 1988: The Green Bay Packers have signed Tiger Greene - FS. |
| Training Camps 1988: The Green Bay Packers have signed Hugh Green - LB. |
| Training Camps 1988: The Green Bay Packers have signed David Greenwood - SS. |
| Training Camps 1988: The Green Bay Packers have signed Jerry Boyarsky - DT. |
| Training Camps 1988: The Green Bay Packers have signed Hollis Thomas - DT. |
| Training Camps 1988: The Green Bay Packers have signed Paul Coffman - TE. |
| Training Camps 1988: The Green Bay Packers have signed Tom Rafferty - C. |
| Training Camps 1988: The Green Bay Packers have signed Steve Grogan - QB. |
| Training Camps 1988: The Green Bay Packers have signed Paul Grasmanis - DT. |
| Training Camps 1988: The Green Bay Packers have signed Jerome Sally - DT. |
| Training Camps 1988: The Green Bay Packers have signed Mark May - T. |
| Training Camps 1988: The Green Bay Packers have signed Neil Elshire - DE. |
| Training Camps 1988: The Green Bay Packers have signed Karl Baldischwiler - T. |
| Training Camps 1988: The Green Bay Packers have signed Jarrett Bush - CB. |
| Training Camps 1988: The Green Bay Packers have signed Mike Gruttadauria - C. |
| Training Camps 1988: The Green Bay Packers have signed Clarence Kay - TE. |
| Training Camps 1988: The Green Bay Packers have signed Nolan Cromwell - SS. |
| Training Camps 1988: The Green Bay Packers have released Todd Marinovich - QB. |
| Training Camps 1988: The Green Bay Packers have released Eric Bieniemy - RB. |
| Training Camps 1988: The Green Bay Packers have released Jerome Sally - DT. |
| Training Camps 1988: The Green Bay Packers have released Cleveland Green - T. |
 | Training Camps 1988: The Chicago Bears have signed Larry Lee - G. |
| Training Camps 1988: The Chicago Bears have signed Bo Eason - FS. |
| Training Camps 1988: The Chicago Bears have signed Andre Waters - SS. |
| Training Camps 1988: The Chicago Bears have signed Tim Spencer - FB. |
| Training Camps 1988: The Chicago Bears have signed Evan Pilgrim - G. |
| Training Camps 1988: The Chicago Bears have signed Aaron Beasley - FS. |
| Training Camps 1988: The Chicago Bears have signed Brian Hansen - P. |
| Training Camps 1988: The Chicago Bears have signed Clint Didier - TE. |
| Training Camps 1988: The Chicago Bears have signed Ken Fantetti - LB. |
| Training Camps 1988: The Chicago Bears have signed Alphonso Carreker - DE. |
| Training Camps 1988: The Chicago Bears have signed Tony Eason - QB. |
| Training Camps 1988: The Chicago Bears have signed Keith Simpson - FS. |
| Training Camps 1988: The Chicago Bears have signed Tony Collins - RB. |
| Training Camps 1988: The Chicago Bears have signed Oliver Luck - QB. |
| Training Camps 1988: The Chicago Bears have signed Derrick Mayes - WR. |
| Training Camps 1988: The Chicago Bears have signed Omar Gaither - LB. |
| Training Camps 1988: The Detroit Lions have signed Paul Fairchild - G. |
| Training Camps 1988: The Detroit Lions have signed Rich Umphrey - C. |
| Training Camps 1988: The Detroit Lions have signed Keith Millard - DT. |
| Training Camps 1988: The Detroit Lions have signed Mark Robinson - CB. |
| Training Camps 1988: The Detroit Lions have signed Rodney Holman - TE. |
| Training Camps 1988: The Detroit Lions have signed Dennis McKinnon - WR. |
| Training Camps 1988: The Detroit Lions have signed Jim Hough - C. |
| Training Camps 1988: The Detroit Lions have released Brad Leggett - C. |
| Training Camps 1988: The Minnesota Vikings have signed Kevin Ross - CB. |
| Training Camps 1988: The Minnesota Vikings have signed Tim Krumrie - DT. |
| Training Camps 1988: The Minnesota Vikings have signed Jon Giesler - T. |
| Training Camps 1988: The Minnesota Vikings have signed Mike Hartenstine - DE. |
| Training Camps 1988: The Minnesota Vikings have signed Petey Perot - G. |
| Training Camps 1988: The Minnesota Vikings have signed Doug Nussmeier - QB. |
| Training Camps 1988: The Minnesota Vikings have signed Darrin Nelson - RB. |
 | Training Camps 1988: The San Francisco 49ers have signed Leonard Marshall - DE. |
| Training Camps 1988: The San Francisco 49ers have signed Sammy Winder - RB. |
| Training Camps 1988: The San Francisco 49ers have signed Joe Morris - RB. |
| Training Camps 1988: The San Francisco 49ers have signed Scott Blanton - K. |
| Training Camps 1988: The San Francisco 49ers have signed Ray Horton - CB. |
| Training Camps 1988: The San Francisco 49ers have signed Marc Wilson - QB. |
| Training Camps 1988: The San Francisco 49ers have released Maurice Johnson - TE. |
| Training Camps 1988: The San Francisco 49ers have released Chuck Osborne - DT. |
| Training Camps 1988: The San Francisco 49ers have released Shawn Vincent - SS. |
| Training Camps 1988: The San Francisco 49ers have released Dan Alexander - G. |
| Training Camps 1988: The San Francisco 49ers have released Tim Colston - DT. |
| Training Camps 1988: The San Francisco 49ers have signed Bill Pickel - DT. |
| Training Camps 1988: The New York Giants have released Scott Milanovich - QB. |
| Training Camps 1988: Trumaine Johnson has been injured. Status: Probable |
| Training Camps 1988: Nick Mangold has been injured. Status: Probable |
| Training Camps 1988: Brent Grimes has been injured. Status: Out (1-2 weeks) |
| Training Camps 1988: Erik Williams has been injured. Status: Out (1-2 weeks) |
| Training Camps 1988: Norm Katnik has been injured. Status: Questionable |
| Training Camps 1988: Dwayne Bowe has been injured. Status: Out (1-2 weeks) |
| Training Camps 1988: Harry Hamilton has been injured. Status: Out (1-2 weeks) |
| Training Camps 1988: Richard Newbill has been injured. Status: Out (2-4 weeks) |
| Training Camps 1988: Eric Williams has been injured. Status: |
| Training Camps 1988: James Jones WR has been injured. Status: Questionable |
| Preseason Week 1, 1988: The London Monarchs have released Tim Barnett - WR. |
| Preseason Week 1, 1988: The London Monarchs have signed Chas Gessner - WR. |
| Preseason Week 1, 1988: The London Monarchs have released Roynell Young - CB. |
| Preseason Week 1, 1988: The London Monarchs have signed Dante Hughes - CB. |
| Preseason Week 1, 1988: The London Monarchs have signed Richard Huntley - RB. |
| Preseason Week 1, 1988: The London Monarchs have signed Demetrious Johnson - SS. |
| Preseason Week 1, 1988: The London Monarchs have signed Brett Miller - T. |
| Preseason Week 1, 1988: The London Monarchs have released Jack Linn - T. |
| Preseason Week 1, 1988: The London Monarchs have signed Patrick Jeffers - WR. |
| Preseason Week 1, 1988: The London Monarchs have signed Brett Ratliff - QB. |
| Preseason Week 1, 1988: The London Monarchs have released Eric Hipple - QB. |
| Preseason Week 1, 1988: The London Monarchs have released Dante Hughes - CB. |
| Preseason Week 1, 1988: The London Monarchs have released James Anderson - LB. |
| Preseason Week 1, 1988: The London Monarchs have released Darryll Lewis - CB. |
| Preseason Week 1, 1988: The New York Giants have signed Darryll Lewis - CB. |
| Preseason Week 1, 1988: The Chiefs trade Anthony Munoz to the Giants for Marvin Powell and a Giants 1990 2nd Round Pick. |
| Preseason Week 1, 1988: The Chiefs trade Anthony Munoz to the Giants for Marvin Powell and a Giants 1990 2nd Round Pick. |
| Preseason Week 1, 1988: The Bears trade Nolan Harrison to the Cardinals for a Cardinals 1990 5th Round Pick. |
| Preseason Week 1, 1988: The Bears trade Nolan Harrison to the Cardinals for a Cardinals 1990 5th Round Pick. |
| Preseason Week 1, 1988: The Chicago Bears have signed Steve Busick - LB. |
| Preseason Week 1, 1988: The New York Giants have released Mel Owens - LB. |
| Preseason Week 1, 1988: The New York Giants have released Leonard Mitchell - T. |
| Preseason Week 1, 1988: The New York Giants have released Chuck Klingbeil - DT. |
| Preseason Week 1, 1988: The New York Giants have released Paul Lankford - CB. |
| Preseason Week 1, 1988: The Chiefs trade Zach Thomas to the Giants for Jerry Gray and a Packers 1989 6th Round Pick. |
| Preseason Week 1, 1988: The Chiefs trade Zach Thomas to the Giants for Jerry Gray and a Packers 1989 6th Round Pick. |
| Preseason Week 1, 1988: The Vikings trade Irving Fryar and a Vikings 1991 1st Round Pick to the Seahawks for Warren Moon. |
| Preseason Week 1, 1988: The Vikings trade Irving Fryar and a Vikings 1991 1st Round Pick to the Seahawks for Warren Moon. |
| Preseason Week 1, 1988: Lance Smith has been injured. Status: Out (12-16 weeks) |
| | Week 2, 1988: James Griffin has recovered from his injury |
| | Week 2, 1988: Kimble Anders has recovered from his injury |
| | Week 2, 1988: Fredd Young has recovered from his injury |
| | Week 2, 1988: Kent Hill has recovered from his injury |
| Week 3, 1988: The Bills trade Sean Jones and a Bills 1989 2nd Round Pick to the Monarchs for Greg Jennings and a Monarchs 1989 3rd Round Pick, a Monarchs 1990 3rd Round Pick. |
| Week 3, 1988: The Bills trade Sean Jones and a Bills 1989 2nd Round Pick to the Monarchs for Greg Jennings and a Monarchs 1989 3rd Round Pick, a Monarchs 1990 3rd Round Pick. |
| | Week 3, 1988: Johnny Rembert has recovered from his injury |
| | Week 4, 1988: Chris Kuper has recovered from his injury |
| | Week 4, 1988: Gary Clark has recovered from his injury |
| | Week 4, 1988: Rodney Holman has recovered from his injury |
| | Week 4, 1988: Ikechuku Ndukwe has recovered from his injury |
| | Week 4, 1988: Marshal Yanda has recovered from his injury |
| | Week 4, 1988: Anthony Carter has recovered from his injury |
| | Week 4, 1988: Lee Williams has recovered from his injury |
| | Week 5, 1988: Randall Cunningham has recovered from his injury |
| | Week 5, 1988: Shaun Gayle has recovered from his injury |
| | Week 5, 1988: Roland James has recovered from his injury |
| | Week 5, 1988: Darryl Tapp has recovered from his injury |
| | Week 5, 1988: Ricky Williams has recovered from his injury |
| Week 6, 1988: The Green Bay Packers have released Tom Rafferty - C. |
| Week 6, 1988: The Green Bay Packers have signed Raphel Cherry - SS. |
| Week 6, 1988: The Bengals trade Michael Otto and a Bengals 1990 2nd Round Pick to the Monarchs for Winston Justice and a Monarchs 1989 4th Round Pick. |
| Week 6, 1988: The Bengals trade Michael Otto and a Bengals 1990 2nd Round Pick to the Monarchs for Winston Justice and a Monarchs 1989 4th Round Pick. |
| Week 6, 1988: The Ravens trade Clay Matthews to the Cardinals for Louis Lipps and a Cardinals 1989 5th Round Pick, a Cardinals 1990 4th Round Pick. |
| Week 6, 1988: The Ravens trade Clay Matthews to the Cardinals for Louis Lipps and a Cardinals 1989 5th Round Pick, a Cardinals 1990 4th Round Pick. |
| Week 6, 1988: The Seahawks trade James Lofton to the Cardinals for Clay Matthews and a Monarchs 1989 5th Round Pick, a Cardinals 1989 6th Round Pick, a Cardinals 1989 7th Round Pick, a Cardinals 1991 3rd Round Pick. |
| Week 6, 1988: The Seahawks trade James Lofton to the Cardinals for Clay Matthews and a Monarchs 1989 5th Round Pick, a Cardinals 1989 6th Round Pick, a Cardinals 1989 7th Round Pick, a Cardinals 1991 3rd Round Pick. |
| | Week 6, 1988: James Griffin has recovered from his injury |
| | Week 6, 1988: Eddie Brown has recovered from his injury |
| | Week 6, 1988: Nevin McCaskill has recovered from his injury |
| | Week 7, 1988: Paul Grasmanis has recovered from his injury |
| | Week 7, 1988: Mark Clayton has recovered from his injury |
| | Week 7, 1988: Dennis Smith has recovered from his injury |
| | Week 7, 1988: Billy Ray Smith has recovered from his injury |
| | Week 7, 1988: Stephone Paige has recovered from his injury |
| | Week 7, 1988: Boomer Esiason has recovered from his injury |