| | | Monday, August 13th, 1979 | | Activated RF José Balderas from the disabled list. |
| Tuesday, August 7th, 1979 | | Activated CF Luis Chávez from the disabled list. |
| Wednesday, August 1st, 1979 | | Placed SP Weston Evans on the 15-day disabled list. |
| Wednesday, July 11th, 1979 | | Placed CF Luis Chávez on the 15-day disabled list. |
| Saturday, July 7th, 1979 | | Activated CF Luis Chávez from the disabled list. | | Activated SP Evan Davis from the disabled list. | | Activated SP Mario Romero from the disabled list. |
| Saturday, June 30th, 1979 | | Activated CF Jon Morton from the disabled list. |
| Friday, June 22nd, 1979 | | Placed SP Mario Romero on the 15-day disabled list. |
| Friday, June 15th, 1979 | | Drafted CF David Carter in the 1979 first-year player draft (Round 6, Pick 5, 110th overall pick). | | Drafted 3B Hugh Treasure in the 1979 first-year player draft (Round 7, Pick 5, 130th overall pick). | | Drafted CF Aaron Simpson in the 1979 first-year player draft (Round 8, Pick 5, 150th overall pick). | | Drafted MR Elroy Stringer in the 1979 first-year player draft (Round 9, Pick 5, 170th overall pick). | | Drafted MR Anthony McCall in the 1979 first-year player draft (Round 10, Pick 5, 190th overall pick). | | Promoted CF Theron Robison to Double A Brownsville. | | Promoted RF Todd Richards to Double A Brownsville. | | Received C Gerald Whitehead from Double A Brownsville. | | Received 2B Joe Woods from Double A Brownsville. | | Placed SP Evan Davis on the 15-day disabled list. |
| Wednesday, June 13th, 1979 | | Placed CF Jon Morton on the 15-day disabled list. |
| Friday, May 25th, 1979 | | Activated RF José Balderas from the disabled list. |
| Sunday, May 13th, 1979 | | Activated 2B Carlos Córdova from the disabled list. |
| Thursday, May 3rd, 1979 | | Placed CF Theron Robison on the 15-day disabled list. |
| Tuesday, April 17th, 1979 | | Placed RF José Balderas on the 15-day disabled list. |
| Monday, April 9th, 1979 | | Placed 2B Carlos Córdova on the 15-day disabled list. |
| Thursday, September 28th, 1978 | | Activated CF Geoffrey Sharpe from the disabled list. |
| Saturday, August 26th, 1978 | | Pitching Coach Dave Covington leaves the team, his contract was not renewed. | | Signed Hitting Coach Ramón Villaroel to a 2-year contract extension. |
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