| | | Thursday, August 7th, 1975 | | Activated CL Fernando Negrete from the disabled list. |
| Monday, August 4th, 1975 | | Activated C Wu Yang from the disabled list. |
| Friday, July 18th, 1975 | | Placed SP Andrew Chapman on the 15-day disabled list. |
| Friday, July 11th, 1975 | | Placed C Wu Yang on the 15-day disabled list. |
| Saturday, June 21st, 1975 | | Activated C Wu Yang from the disabled list. |
| Sunday, June 15th, 1975 | | Promoted SP Pat Pope to Double A Kingsville. | | Promoted 1B Emílio Torres to Double A Kingsville. | | Received SS Jesús Villarreal from Double A Kingsville. | | Signed free agent MR Bartolo Valéncia to a minor league contract. | | Signed free agent MR Gabe Clarke to a minor league contract. | | Signed free agent MR Dave Moore to a minor league contract. | | Signed free agent MR Bill Hastings to a minor league contract. | | Signed free agent SP Eric Hudson to a minor league contract. | | Signed free agent SP Bob Foster to a minor league contract. | | Signed free agent CL Ken Patterson to a minor league contract. | | Signed free agent 3B Jesús Montoya to a minor league contract. | | Signed free agent 3B Daniel Canó to a minor league contract. | | Signed free agent SS Guan-cai Ru to a minor league contract. | | Promoted MR Dave Moore to Triple A Peterborough. | | Promoted MR Gabe Clarke to Double A Kingsville. | | Promoted CL Ken Patterson to Double A Kingsville. | | Promoted SP Eric Hudson to Double A Kingsville. | | Promoted MR Bartolo Valéncia to Double A Kingsville. | | Promoted MR Bill Hastings to Double A Kingsville. | | Promoted C Brian Madden to Double A Kingsville. | | Received SP Dennis Scott from Double A Kingsville. | | Received SP Neal Whitaker from Double A Kingsville. | | Received SP Pat Pope from Double A Kingsville. | | Received MR Alden Robinson from Double A Kingsville. | | Received MR Jerry Burns from Double A Kingsville. | | Received MR Luis Alfonso from Double A Kingsville. | | Received C Wynn Johnson from Double A Kingsville. | | Drafted LF Millard Chase in the 1975 first-year player draft (Round 6, Pick 16, 122nd overall pick). | | Drafted MR Ron Eacott in the 1975 first-year player draft (Round 7, Pick 16, 143rd overall pick). | | Drafted 1B Iván Salas in the 1975 first-year player draft (Round 8, Pick 16, 163rd overall pick). | | Drafted MR Octávio Souza in the 1975 first-year player draft (Round 9, Pick 16, 183rd overall pick). | | Drafted 1B Cameron Lewis in the 1975 first-year player draft (Round 10, Pick 16, 203rd overall pick). |
| Tuesday, June 3rd, 1975 | | Placed C Wu Yang on the 15-day disabled list. |
| Monday, May 26th, 1975 | | Activated 2B Cliff Mitchell from the disabled list. |
| Saturday, May 17th, 1975 | | Placed SS Jesús Villarreal on the 15-day disabled list. |
| Friday, May 2nd, 1975 | | Placed 2B Cliff Mitchell on the 15-day disabled list. |
| Sunday, August 25th, 1974 | | Signed pitching coach Bradley Ivy. |
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