| Monday, July 13th, 1959 | Released 1B Juan Díaz. | Sunday, June 21st, 1959 | Activated SS Jude Medforth from the disabled list. | Monday, June 15th, 1959 | Promoted 3B José Barajas to Double A Corpus Christi. | Received LF Ánibal Peńa from Double A Corpus Christi. | Released LF Rudy Young. | Released LF José Palácios. | Received LF José Palácios from Double A Corpus Christi. | Drafted MR Ken McMahon in the 1959 first-year player draft (Round 6, Pick 9, 96th overall pick). | Drafted 2B Gabe Brown in the 1959 first-year player draft (Round 7, Pick 9, 112nd overall pick). | Drafted MR Brennan Rogers in the 1959 first-year player draft (Round 8, Pick 9, 128th overall pick). | Drafted MR Sergio Marino in the 1959 first-year player draft (Round 9, Pick 9, 144th overall pick). | Drafted SP Héctor Maldonado in the 1959 first-year player draft (Round 10, Pick 9, 160th overall pick). | Wednesday, March 25th, 1959 | Released MR Milton Wallace.(Career-ending injury) | Tuesday, October 7th, 1958 | Activated 3B Rocky Schmidt from the disabled list. | Activated 2B Kevin Lee from the disabled list. | Sunday, September 7th, 1958 | Placed 2B Kevin Lee on the 15-day disabled list. | |
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