| Monday, August 4th, 1958 | Released 3B Phil Hall. | Saturday, July 5th, 1958 | Placed MR Orlando Cedeño on the 15-day disabled list. | Sunday, June 15th, 1958 | Drafted SS Jeffrey Carson in the 1958 first-year player draft (Round 6, Pick 8, 94th overall pick). | Drafted SP Kawanari Ishikawa in the 1958 first-year player draft (Round 7, Pick 8, 111st overall pick). | Drafted 3B Harrison Harrison in the 1958 first-year player draft (Round 8, Pick 8, 127th overall pick). | Drafted SP Paco Romero in the 1958 first-year player draft (Round 9, Pick 8, 143rd overall pick). | Drafted 3B Brian Hawkins in the 1958 first-year player draft (Round 10, Pick 8, 159th overall pick). | Promoted RF Jason Potts to Double A Austin. | Saturday, May 17th, 1958 | Activated CF Sixto Rodríguez from the disabled list. | Wednesday, April 16th, 1958 | Placed CF Sixto Rodríguez on the 15-day disabled list. | Thursday, August 29th, 1957 | Signed Manager Ray Thompson to a 1-year contract extension. | Signed Pitching Coach David McCourt to a 3-year contract extension. | |
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