| | | Thursday, July 12th, 1979 | | Placed SS Joe Dunn on the 15-day disabled list. |
| Wednesday, June 20th, 1979 | | Activated LF Lance Rollo from the disabled list. |
| Friday, June 15th, 1979 | | Drafted MR Bryan Moody in the 1979 first-year player draft (Round 6, Pick 15, 120th overall pick). | | Drafted CF Tom Waddell in the 1979 first-year player draft (Round 7, Pick 15, 140th overall pick). | | Drafted MR Jacob Murdock in the 1979 first-year player draft (Round 8, Pick 15, 160th overall pick). | | Drafted MR António Morales in the 1979 first-year player draft (Round 9, Pick 15, 180th overall pick). | | Drafted SP Sam Payne in the 1979 first-year player draft (Round 10, Pick 15, 200th overall pick). | | Promoted LF Joe Abraham to Double A Harlingen. |
| Tuesday, June 5th, 1979 | | Placed LF Lance Rollo on the 15-day disabled list. |
| Wednesday, May 23rd, 1979 | | Activated MR Dominic Byrd from the disabled list. |
| Tuesday, May 8th, 1979 | | Placed MR Dominic Byrd on the 15-day disabled list. |
| Monday, May 7th, 1979 | | Activated LF Lance Rollo from the disabled list. |
| Thursday, April 26th, 1979 | | Placed 1B Anthony Knight on the 15-day disabled list. |
| Saturday, November 4th, 1978 | | Released RF Jesús Silva.(Career-ending injury) |
| Sunday, October 29th, 1978 | | Activated SP Mideskso Kafil from the disabled list. |
| Friday, October 27th, 1978 | | Activated RF Wilford Collins from the disabled list. |
| Thursday, October 12th, 1978 | | Placed RF Wilford Collins on the 15-day disabled list. |
| Saturday, August 26th, 1978 | | Signed Pitching Coach Jake Ford to a 1-year contract extension. |
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