| Monday, August 14th, 1978 | Activated SS Jesús Hernández from the disabled list. | Friday, July 14th, 1978 | Placed C Alonso Reyes on the 15-day disabled list. | Tuesday, June 20th, 1978 | Placed SS Paul Stephens on the 15-day disabled list. | Thursday, June 15th, 1978 | Drafted SP Víctor López in the 1978 first-year player draft (Round 6, Pick 9, 114th overall pick). | Drafted C José Martínez in the 1978 first-year player draft (Round 7, Pick 9, 134th overall pick). | Drafted MR Carlos Cota in the 1978 first-year player draft (Round 8, Pick 9, 154th overall pick). | Drafted C Juan González in the 1978 first-year player draft (Round 9, Pick 9, 174th overall pick). | Drafted SP Ken Jensen in the 1978 first-year player draft (Round 10, Pick 9, 194th overall pick). | Promoted RF David Hughes to Double A Freeport. | Promoted 3B David Bell to Double A Freeport. | Promoted CF Ernesto Ramírez to Double A Freeport. | Received MR Jorge González from Double A Freeport. | Tuesday, May 23rd, 1978 | Placed MR Ben Davis on the 15-day disabled list. | Friday, May 12th, 1978 | Activated C Chuck Jones from the disabled list. | Monday, April 24th, 1978 | Activated CF Ernesto Ramírez from the disabled list. | Tuesday, April 18th, 1978 | Placed C Chuck Jones on the 15-day disabled list. | Sunday, April 9th, 1978 | Placed CF Ernesto Ramírez on the 15-day disabled list. | Wednesday, November 16th, 1977 | Signed hitting coach Vincent Carr. | Wednesday, October 5th, 1977 | HC Joe Church retires. | Thursday, August 25th, 1977 | Signed Manager Gary Mitchell to a 2-year contract extension. | |
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