| Sunday, August 17th, 1958 | Released CF Damon Lee. | Thursday, June 26th, 1958 | Placed LF Eduardo Gómez on the 15-day disabled list. | Sunday, June 15th, 1958 | Promoted LF Myron Ashley to Double A Port Lavaca. | Promoted MR Bill Robinson to Double A Port Lavaca. | Received SP Gonzalo Gutiérrez from Double A Port Lavaca. | Drafted SS Aaron Moran in the 1958 first-year player draft (Round 6, Pick 15, 101st overall pick). | Drafted CF John Gorman in the 1958 first-year player draft (Round 7, Pick 15, 118th overall pick). | Drafted 2B Will Boyd in the 1958 first-year player draft (Round 8, Pick 15, 134th overall pick). | Drafted RF Jesús Caro in the 1958 first-year player draft (Round 9, Pick 15, 150th overall pick). | Drafted CF Jesús Canales in the 1958 first-year player draft (Round 10, Pick 15, 166th overall pick). | Tuesday, May 27th, 1958 | Placed CF Eduardo Gómez on the 15-day disabled list. | Thursday, May 22nd, 1958 | Activated SP Álex Durón from the disabled list. | Monday, April 21st, 1958 | Placed SP Álex Durón on the 15-day disabled list. | Wednesday, February 19th, 1958 | Activated CF Eduardo Gómez from the disabled list. | Tuesday, February 4th, 1958 | Placed CF Eduardo Gómez on the 15-day disabled list. | Tuesday, September 24th, 1957 | Activated MR Cale Cochran from the disabled list. | Tuesday, September 3rd, 1957 | Signed pitching coach Aaron Gallon. | |
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