| Wednesday, August 28th, 1957 | Activated SP Alfredo Alvarado from the disabled list. | Saturday, June 15th, 1957 | Promoted 3B Máximo Ramírez to Double A Alice. | Released 2B Glenn Livingston. | Promoted LF Ryan Fontenot to Double A Alice. | Drafted RF Manny Hernández in the 1957 first-year player draft (Round 6, Pick 5, 92nd overall pick). | Drafted CF Iván Salazar in the 1957 first-year player draft (Round 7, Pick 5, 108th overall pick). | Drafted SP Larry Dorsett in the 1957 first-year player draft (Round 8, Pick 5, 124th overall pick). | Drafted SS Norberto Sandoval in the 1957 first-year player draft (Round 9, Pick 5, 140th overall pick). | Drafted MR Jorge Jaramillo in the 1957 first-year player draft (Round 10, Pick 5, 156th overall pick). | Friday, February 15th, 1957 | Activated SP Francisco Flores from the disabled list. | Thursday, October 11th, 1956 | Activated LF Jeff Cain from the disabled list. | |
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