| Friday, July 3rd, 1959 | Activated MR Juan Rodríguez from the disabled list. | Monday, June 15th, 1959 | Released 3B Felipe Vallejo. | Promoted SS Mac Lang to Double A Galveston. | Received 3B Gilberto Vega from Double A Galveston. | Drafted C Jeremiah Steward in the 1959 first-year player draft (Round 6, Pick 4, 91st overall pick). | Drafted SS Dennis Dean in the 1959 first-year player draft (Round 7, Pick 4, 107th overall pick). | Drafted C Justin Krieger in the 1959 first-year player draft (Round 8, Pick 4, 123rd overall pick). | Drafted MR Tim Everett in the 1959 first-year player draft (Round 9, Pick 4, 139th overall pick). | Drafted C Bill Saunders in the 1959 first-year player draft (Round 10, Pick 4, 155th overall pick). | Tuesday, May 26th, 1959 | Activated 3B Fraser White from the disabled list. | Tuesday, September 16th, 1958 | Released SP Michael Walker.(Career-ending injury) | |
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