| Saturday, August 16th, 1975 | Activated SS Joe Maynard from the disabled list. | Saturday, August 9th, 1975 | Activated SP Elliott Meadows from the disabled list. | Wednesday, July 30th, 1975 | Activated CL Tomás Marín from the disabled list. | Monday, July 28th, 1975 | Activated MR José Vallés from the disabled list. | Monday, July 7th, 1975 | Activated CF Bob Cummins from the disabled list. | Thursday, June 19th, 1975 | Placed CF Bob Cummins on the 15-day disabled list. | Sunday, June 15th, 1975 | Drafted 3B Robby Wright in the 1975 first-year player draft (Round 6, Pick 10, 116th overall pick). | Drafted SP Pedro Vázquez in the 1975 first-year player draft (Round 7, Pick 10, 137th overall pick). | Drafted C António Castillo in the 1975 first-year player draft (Round 8, Pick 10, 157th overall pick). | Drafted SP Steven Slagle in the 1975 first-year player draft (Round 9, Pick 10, 177th overall pick). | Drafted 1B Domingo Marín in the 1975 first-year player draft (Round 10, Pick 10, 197th overall pick). | Promoted SP Edward Brennan to Double A San Antonio. | Received SP Jason Clarke from Double A San Antonio. | Thursday, May 29th, 1975 | Activated SP Edward Brennan from the disabled list. | Saturday, May 17th, 1975 | Activated CF Bob Cummins from the disabled list. | Tuesday, May 13th, 1975 | Activated 2B Lester O'Brien from the disabled list. | Friday, May 2nd, 1975 | Placed MR José Vallés on the 15-day disabled list. | Placed CF Bob Cummins on the 15-day disabled list. | Monday, April 28th, 1975 | Placed 2B Lester O'Brien on the 15-day disabled list. | Friday, April 25th, 1975 | Placed SP Edward Brennan on the 15-day disabled list. | Sunday, March 23rd, 1975 | Activated SP Elliott Meadows from the disabled list. | Monday, September 30th, 1974 | 1B Jason Tucker becomes a free-agent. | |
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