| Tuesday, August 19th, 1980 | Promoted SP Jon West to Double A Alice. | Tuesday, July 22nd, 1980 | Activated SS Artie Smith from the disabled list. | Sunday, July 6th, 1980 | Placed 2B Aurelio Santos on the 15-day disabled list. | Thursday, June 26th, 1980 | Activated LF Julián Torres from the disabled list. | Sunday, June 15th, 1980 | Drafted RF Ed Hughes in the 1980 first-year player draft (Round 7, Pick 4, 129th overall pick). | Drafted MR Jeffrey Ward in the 1980 first-year player draft (Round 8, Pick 4, 149th overall pick). | Drafted MR Seung-mo Won in the 1980 first-year player draft (Round 9, Pick 4, 169th overall pick). | Drafted SP Dave Baxter in the 1980 first-year player draft (Round 10, Pick 4, 189th overall pick). | Promoted RF Dong-joon Yi to Double A Alice. | Promoted RF Jesús García to Double A Alice. | Received MR Henry O'Donnell from Double A Alice. | Received 2B Aurelio Santos from Double A Alice. | Friday, May 30th, 1980 | Placed LF Julián Torres on the 15-day disabled list. | Thursday, April 17th, 1980 | Placed SS Artie Smith on the 15-day disabled list. | Saturday, February 2nd, 1980 | Activated MR Charles Lang from the disabled list. | Friday, January 18th, 1980 | Placed MR Charles Lang on the 15-day disabled list. | Saturday, August 25th, 1979 | Activated CF Roger Clark from the disabled list. | |
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