| | | Tuesday, July 29th, 1958 | | Released 3B Xu Sen. |
| Thursday, July 24th, 1958 | | Placed CF Lúcio Ayala on the 15-day disabled list. |
| Sunday, July 13th, 1958 | | Placed SP Alan Lawrence on the 15-day disabled list. |
| Saturday, June 21st, 1958 | | Activated SS Sloan Jackson from the disabled list. |
| Sunday, June 15th, 1958 | | Promoted SP Robinson Hernández to Double A Corpus Christi. | | Promoted 3B Mark Wheeler to Double A Corpus Christi. | | Promoted CF Sherman Dillard to Double A Corpus Christi. | | Received SP Emílio Barrón from Double A Corpus Christi. | | Received 3B Greg Case from Double A Corpus Christi. | | Received RF Robert Brown from Double A Corpus Christi. | | Drafted 1B Walt Curtis in the 1958 first-year player draft (Round 6, Pick 13, 99th overall pick). | | Drafted RF Lúcio Ayala in the 1958 first-year player draft (Round 7, Pick 13, 116th overall pick). | | Drafted MR Elijah Gill in the 1958 first-year player draft (Round 8, Pick 13, 132nd overall pick). | | Drafted RF Bryant Griffin in the 1958 first-year player draft (Round 9, Pick 13, 148th overall pick). | | Drafted MR José Morales in the 1958 first-year player draft (Round 10, Pick 13, 164th overall pick). |
| Wednesday, October 23rd, 1957 | | Activated SP José Medina from the disabled list. |
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