| | | Tuesday, August 16th, 1977 | | Placed RF Enrique Ríos on the 15-day disabled list. |
| Saturday, July 23rd, 1977 | | Activated RF Enrique Ríos from the disabled list. | | Placed SP Octávio López on the 15-day disabled list. |
| Saturday, July 16th, 1977 | | Placed 2B Jarred Roberts on the 15-day disabled list. |
| Sunday, July 10th, 1977 | | Activated SP Marcos Aranda from the disabled list. |
| Thursday, June 30th, 1977 | | Activated MR Dave Kidd from the disabled list. |
| Monday, June 27th, 1977 | | Placed RF Enrique Ríos on the 15-day disabled list. |
| Wednesday, June 15th, 1977 | | Received 2B Manlio Coppola from Double A San Antonio. | | Drafted 3B Chris Johnston in the 1977 first-year player draft (Round 6, Pick 6, 114th overall pick). | | Drafted SP Brandon González in the 1977 first-year player draft (Round 7, Pick 6, 136th overall pick). | | Drafted LF Lee Sheehan in the 1977 first-year player draft (Round 8, Pick 6, 156th overall pick). | | Drafted MR Darrell Mansvelt in the 1977 first-year player draft (Round 9, Pick 6, 176th overall pick). | | Drafted 1B Eric Manley in the 1977 first-year player draft (Round 10, Pick 6, 196th overall pick). | | Placed MR Dave Kidd on the 15-day disabled list. |
| Sunday, June 12th, 1977 | | Placed SP Marcos Aranda on the 15-day disabled list. |
| Saturday, June 4th, 1977 | | Activated RF Enrique Ríos from the disabled list. |
| Friday, April 29th, 1977 | | Placed RF Enrique Ríos on the 15-day disabled list. |
| Saturday, April 23rd, 1977 | | Placed LF Ryan Johnson on the 15-day disabled list. |
| Friday, September 24th, 1976 | | Activated SP Shuncho Sakamoto from the disabled list. |
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