| | | Sunday, August 3rd, 1980 | | Activated 2B Angelo Bashford from the disabled list. | | Wednesday, June 25th, 1980 | | Placed 2B Angelo Bashford on the 15-day disabled list. | | Tuesday, June 24th, 1980 | | Activated CF Héctor Guzmán from the disabled list. | | Sunday, June 15th, 1980 | | Promoted 1B Miguel Flores to Double A Kingsville. | | Drafted SP Chae-seong Ogum in the 1980 first-year player draft (Round 7, Pick 17, 142nd overall pick). | | Drafted CF Jack Hill in the 1980 first-year player draft (Round 8, Pick 17, 162nd overall pick). | | Drafted MR Rubén Ortega in the 1980 first-year player draft (Round 9, Pick 17, 182nd overall pick). | | Drafted SP Liam Grange in the 1980 first-year player draft (Round 10, Pick 17, 202nd overall pick). | | Monday, May 26th, 1980 | | Placed CF Héctor Guzmán on the 15-day disabled list. | | Monday, May 5th, 1980 | | Activated MR Kyle Lowry from the disabled list. | | Monday, December 31st, 1979 | | Activated SP Jesús Pinto from the disabled list. | | Thursday, November 15th, 1979 | | Activated CF Pedro Baca from the disabled list. | | Monday, October 1st, 1979 | | LF Eddy Steward becomes a free-agent. | | Thursday, August 23rd, 1979 | | Signed Manager Paco Rivas to a 3-year contract extension. | | Signed Hitting Coach Carl McQuinston to a 1-year contract extension. | | Released RF Mark Koons. | |
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