| | | Tuesday, August 7th, 1979 | | Activated RF Mike Lewis from the disabled list. |
| Sunday, August 5th, 1979 | | Activated LF Enrique Ríos from the disabled list. |
| Saturday, July 14th, 1979 | | Placed RF Mike Lewis on the 15-day disabled list. |
| Tuesday, July 10th, 1979 | | Placed SP Axel Jamieson on the 15-day disabled list. |
| Tuesday, July 3rd, 1979 | | Activated MR Pedro Vázquez from the disabled list. |
| Monday, July 2nd, 1979 | | Activated CL Kerry Johnson from the disabled list. |
| Saturday, June 30th, 1979 | | Placed LF Enrique Ríos on the 15-day disabled list. |
| Sunday, June 17th, 1979 | | Placed CL Kerry Johnson on the 15-day disabled list. |
| Friday, June 15th, 1979 | | Drafted CF Manny Gallegos in the 1979 first-year player draft (Round 6, Pick 1, 106th overall pick). | | Drafted MR Firhoun Kioi in the 1979 first-year player draft (Round 7, Pick 1, 126th overall pick). | | Drafted 3B Rob Rose in the 1979 first-year player draft (Round 8, Pick 1, 146th overall pick). | | Drafted SP Landon Stewart in the 1979 first-year player draft (Round 9, Pick 1, 166th overall pick). | | Drafted MR Norm Kessler in the 1979 first-year player draft (Round 10, Pick 1, 186th overall pick). |
| Tuesday, June 5th, 1979 | | Activated CF Mike Lewis from the disabled list. |
| Tuesday, May 15th, 1979 | | Placed CF Mike Lewis on the 15-day disabled list. |
| Sunday, April 22nd, 1979 | | Placed MR Pedro Vázquez on the 15-day disabled list. |
| Friday, February 2nd, 1979 | | Activated SP Dave Meredith from the disabled list. |
| Monday, October 9th, 1978 | | Activated SP Salvador García from the disabled list. |
| Wednesday, September 13th, 1978 | | Signed pitching coach Larry Hill. |
| Saturday, August 26th, 1978 | | Pitching Coach Luis González leaves the team, his contract was not renewed. | | Signed Hitting Coach Josh Higgins to a 1-year contract extension. |
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