Transactions
Transactions listed are from October 1 of previous year to April 1 of the following year.
- November 9, 1987
Mike Heath granted Free Agency.
Bill Madlock granted Free Agency.
Jack Morris granted Free Agency.
Frank Tanana granted Free Agency.
Released Larry Herndon.
- November 15, 1987
Bill Laskey granted Free Agency.
- December 1, 1987
Signed Mike Heath as a free agent.
- December 5, 1987
Traded Dan Petry to the California Angels. Received Gary Pettis.
- December 7, 1987
Drafted John Wetteland from the Los Angeles Dodgers in the 1987 rule 5 draft.
- December 8, 1987
Signed Dave Beard as a free agent.
- December 14, 1987
Signed Larry Herndon as a free agent.
- December 29, 1987
Signed Jack Morris as a free agent.
- December 30, 1987
Signed Mike Brown as a free agent.
- January 22, 1988
Tom Brookens granted Free Agency.
Kirk Gibson granted Free Agency.
- February 9, 1988
Signed Tom Brookens as a free agent.
- February 17, 1988
Signed Frank Tanana as a free agent.
- February 20, 1988
Signed Luis Salazar as a free agent.
- February 24, 1988
Traded Doug Baker to the Minnesota Twins. Received Julius McDougal (minors).
- February 27, 1988
Traded Mark Thurmond to the Baltimore Orioles. Received Ray Knight.
- March 23, 1988
Signed Mark Huismann as a free agent.
- March 24, 1988
Traded Balvino Gálvez to the Minnesota Twins. Received Billy Beane.
- March 28, 1988
Traded Karl Best to the Minnesota Twins. Received Don Schulze.
- March 29, 1988
Returned John Wetteland (earlier draft pick) to the Los Angeles Dodgers.
- March 31, 1988
Signed Mike Trujillo as a free agent.
- June 1, 1988
Drafted Rico Brogna in the 1st round (26th pick) of the 1988 amateur draft. Player signed June 18, 1988.
Drafted Scott Livingstone in the 2nd round of the 1988 amateur draft. Player signed June 8, 1988.
Drafted Kurt Knudsen in the 9th round of the 1988 amateur draft.
Drafted Dave Haas in the 15th round of the 1988 amateur draft. Player signed June 15, 1988.
Drafted Rich Rowland in the 17th round of the 1988 amateur draft. Player signed June 4, 1988.
- June 5, 1988
Signed Dwayne Murphy as a free agent.
- June 6, 1988
Released Jim Morrison.
- June 22, 1988
Signed Iván de Jesús as a free agent.
- July 14, 1988
Mike Brown player rights sold to the California Angels.
- August 28, 1988
Signed Shawn Hare as an amateur free agent.
- August 31, 1988
Traded players to be named later and Chris Hoiles to the Baltimore Orioles. Received Fred Lynn. The Detroit Tigers sent Cesar Mejia (minors) (September 9, 1988) and Robinson Garces (minors) (September 9, 1988) to the Baltimore Orioles to complete the trade.
Traded Mark Lee and Rey Palacios to the Kansas City Royals. Received Ted Power.
- September 2, 1988
Signed Chris Bando as a free agent.
- October 7, 1988
Released Chris Bando.
- October 15, 1988
Billy Beane granted Free Agency.
Stan Clarke granted Free Agency.
Don Heinkel granted Free Agency.
Don Schulze granted Free Agency.
- October 24, 1988
Doyle Alexander granted Free Agency.
- October 28, 1988
Traded Walt Terrell to the San Diego Padres. Received Chris Brown and Keith Moreland.
- November 4, 1988
Dave Bergman granted Free Agency.
Darrell Evans granted Free Agency.
Ted Power granted Free Agency.
Released Larry Herndon.
- November 14, 1988
Signed Jeff Datz as a free agent.
- November 16, 1988
Released Ray Knight.
- November 30, 1988
Signed Randy Bockus as a free agent.
- December 4, 1988
Signed Larry See as a free agent.
- December 5, 1988
Signed Al Pedrique as a free agent.
- December 7, 1988
Signed Dave Bergman as a free agent.
Signed Ted Power as a free agent.
- January 13, 1989
Signed Doyle Alexander as a free agent.
- January 16, 1989
Signed Frank Williams as a free agent.
- February 22, 1989
Released Mark Huismann.
- February 25, 1989
Signed David Palmer as a free agent.
- March 23, 1989
Traded Tom Brookens to the New York Yankees. Received Charles Hudson.
Traded Luis Salazar to the San Diego Padres. Received Mike Brumley.
Traded Eric King to the Chicago White Sox. Received Ken Williams.
- March 25, 1989
Released Ted Power.
- March 27, 1989
Released Dwayne Murphy.
- April 1, 1989
Signed Ed Núñez as a free agent.
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