| | | Friday, August 19th, 1977 | | Activated 2B Henry Scott from the disabled list. |
| Wednesday, August 3rd, 1977 | | Placed 2B Henry Scott on the 15-day disabled list. |
| Wednesday, July 20th, 1977 | | Activated SS Mike Bishop from the disabled list. |
| Monday, June 27th, 1977 | | Activated 2B Henry Scott from the disabled list. |
| Wednesday, June 22nd, 1977 | | Placed SS Mike Bishop on the 15-day disabled list. |
| Wednesday, June 15th, 1977 | | Drafted SP Edgardo Márquez in the 1977 first-year player draft (Round 6, Pick 20, 128th overall pick). | | Drafted 3B Pablo Salazar in the 1977 first-year player draft (Round 7, Pick 20, 150th overall pick). | | Drafted MR Ed Fletcher in the 1977 first-year player draft (Round 8, Pick 20, 170th overall pick). | | Drafted MR Bob Kimball in the 1977 first-year player draft (Round 10, Pick 20, 210th overall pick). | | Promoted 2B Terry Bonner to Double A Harlingen. |
| Sunday, May 15th, 1977 | | Placed SP Mauro Sánchez on the 15-day disabled list. |
| Wednesday, May 11th, 1977 | | Placed 2B Henry Scott on the 15-day disabled list. |
| Wednesday, May 4th, 1977 | | Placed SP John Hobbs on the 15-day disabled list. |
| Friday, April 15th, 1977 | | Activated SP Tom Vaughan from the disabled list. |
| Friday, December 31st, 1976 | | Activated SP Dongdo-pa Wu from the disabled list. |
| Monday, September 6th, 1976 | | Activated CF Sixto Cuestas from the disabled list. |
| Thursday, August 26th, 1976 | | Signed Manager Don Norris to a 1-year contract extension. | | Signed Pitching Coach Jake Ford to a 1-year contract extension. | | Signed Hitting Coach Ronald Turner to a 3-year contract extension. |
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