| | | Saturday, August 10th, 1957 | | Placed LF Bill Jacobs on the 15-day disabled list. | | Saturday, June 15th, 1957 | | Received SS Tomas Rocheleau from Double A Galveston. | | Released 2B John Walker. | | Released 3B Luis Ortíz. | | Promoted 2B Tony Ball to Double A Galveston. | | Received SS Ricardo Medina from Double A Galveston. | | Drafted 1B Willie McIlwhom in the 1957 first-year player draft (Round 6, Pick 6, 93rd overall pick). | | Drafted SP Manuel Hernández in the 1957 first-year player draft (Round 7, Pick 6, 109th overall pick). | | Drafted MR Eric Davis in the 1957 first-year player draft (Round 8, Pick 6, 125th overall pick). | | Drafted SP Bill Smith in the 1957 first-year player draft (Round 9, Pick 6, 141st overall pick). | | Drafted C Pedro Sepúlveda in the 1957 first-year player draft (Round 10, Pick 6, 157th overall pick). | | Wednesday, June 12th, 1957 | | Released SS Thu Vu. | | Wednesday, April 10th, 1957 | | Released MR José Pérez. | | Wednesday, September 12th, 1956 | | Activated SP Ken Stephens from the disabled list. | |
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