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Lost World Series (4-2) to Philadelphia Phillies Won AL Championship Series (3-0) over New York Yankees |

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Transactions listed are from November 1 of previous year to April 1 of the following year.
October 24, 1979
Traded Kevin Gillen (minors) to the Milwaukee Brewers. Received Lance Rautzhan.
October 26, 1979
Released Steve Mingori.
Traded George Throop to the Houston Astros. Received a player to be named later. The Houston Astros sent Keith Drumright (October 26, 1979) to the Kansas City Royals to complete the trade.
November 1, 1979
Al Hrabosky granted Free Agency.
Freddie Patek granted Free Agency.
December 3, 1979
Drafted Manny Castillo from the St. Louis Cardinals in the 1979 rule 5 draft.
December 6, 1979
Traded a player to be named later, Al Cowens and Todd Cruz to the California Angels. Received Willie Aikens and Rance Mulliniks. The Kansas City Royals sent Craig Eaton (April 1, 1980) to the California Angels to complete the trade.
December 12, 1979
Released Jim Nettles.
January 5, 1980
Signed Tom Candiotti as a free agent.
January 11, 1980
Drafted Tim Crews in the 2nd round of the 1980 amateur draft (January), but did not sign the player.
January 15, 1980
Traded Joe Zdeb to the Chicago White Sox. Received Eddie Bane.
February 27, 1980
Signed Jim Scranton as an amateur free agent.
March 28, 1980
Signed Dave Chalk as a free agent.
April 5, 1980 (Standings)
Released Eduardo Rodriguez.
May 5, 1980 (Standings)
Signed Rusty Torres as a free agent.
June 2, 1980 (Standings)
Released Steve Braun.
June 3, 1980 (Standings)
Drafted Keith Creel in the 1st round (4th pick) of the 1980 amateur draft (June Secondary).
Drafted Frank Wills in the 1st round (16th pick) of the 1980 amateur draft.
Drafted Rondin Johnson in the 6th round of the 1980 amateur draft.
Drafted Don Slaught in the 7th round of the 1980 amateur draft. Player signed June 15, 1980.
Drafted Cliff Pastornicky in the 8th round of the 1980 amateur draft.
Drafted Butch Davis in the 12th round of the 1980 amateur draft.
Drafted Bob Hegman in the 15th round of the 1980 amateur draft.
Drafted Tom Romano in the 17th round of the 1980 amateur draft.
June 12, 1980 (Standings)
Signed Rawly Eastwick as a free agent.
June 16, 1980 (Standings)
Signed Mark Huismann as an amateur free agent.
June 17, 1980 (Standings)
Traded a player to be named later to the New York Mets. Received Kevin Kobel. The Kansas City Royals sent Randy McGilberry (June 23, 1980) to the New York Mets to complete the trade.
August, 1980 (Standings)
Sold Keith Drumright to the Chicago Cubs.
August 11, 1980 (Standings)
Signed Ken Brett as a free agent.
August 21, 1980 (Standings)
Signed Jose Cardenal as a free agent.
Released Rawly Eastwick.
August 29, 1980 (Standings)
Released Steve Busby.
Released Rusty Torres.
October 24, 1980
Dave Chalk granted Free Agency.
Pete LaCock granted Free Agency.
Marty Pattin granted Free Agency.
November 11, 1980
Signed Dave Chalk as a free agent.
November 13, 1980
Jose Cardenal granted Free Agency.
November 24, 1980
Darrell Porter granted Free Agency.
December 8, 1980
Tom Candiotti drafted by the Milwaukee Brewers in the 1980 rule 5 draft.
Drafted Dave Wehrmeister from the New York Yankees in the 1980 rule 5 draft.
Drafted Jim Wright from the Philadelphia Phillies in the 1980 rule 5 draft.
December 9, 1980
Signed Lee May as a free agent.
January 6, 1981
Signed Derek Botelho as a free agent.
January 13, 1981
Drafted Dave Johnson in the 5th round of the 1981 amateur draft (January), but did not sign the player.
Drafted Russ Morman in the 7th round of the 1981 amateur draft (January), but did not sign the player.
Drafted Bill Pecota in the 10th round of the 1981 amateur draft (January).
January 21, 1981
Traded German Barranca to the Cincinnati Reds. Received Cesar Geronimo.
February 16, 1981
Traded Dennis Webb (minors) to the Chicago Cubs. Received Greg Keatley.
February 28, 1981
Signed Don Hood as a free agent.
March 31, 1981
Traded John Skinner (minors) and Marvell Wynne to the New York Mets. Received Juan Berenguer.