| Saturday, August 19th, 1978 | Activated RF Alex Lehman from the disabled list. | Wednesday, August 16th, 1978 | Activated 3B Artie Fullwood from the disabled list. | Friday, August 4th, 1978 | Placed RF Alex Lehman on the 15-day disabled list. | Sunday, July 23rd, 1978 | Placed SP Roger Hooper on the 15-day disabled list. | Sunday, July 16th, 1978 | Placed 3B Artie Fullwood on the 15-day disabled list. | Thursday, June 15th, 1978 | Promoted RF Mike White to Double A Galveston. | Promoted RF Thomas-Louis Boutin to Double A Galveston. | Received 2B António Valéncia from Double A Galveston. | Drafted 2B Miguel Flores in the 1978 first-year player draft (Round 7, Pick 8, 133rd overall pick). | Drafted 2B Ramón Vásquez in the 1978 first-year player draft (Round 8, Pick 8, 153rd overall pick). | Drafted SS Anthony Schmidt in the 1978 first-year player draft (Round 9, Pick 8, 173rd overall pick). | Drafted MR Álex Cerda in the 1978 first-year player draft (Round 10, Pick 8, 193rd overall pick). | Monday, May 15th, 1978 | Activated CF Alex Lehman from the disabled list. | Saturday, April 29th, 1978 | Placed CF Alex Lehman on the 15-day disabled list. | Wednesday, October 5th, 1977 | C Ben Barker becomes a free-agent. | |
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