| Monday, June 24th, 1957 | Placed MR Morgan Berry on the 15-day disabled list. | Saturday, June 15th, 1957 | Received LF Alex Peterson from Double A Harlingen. | Activated RF Gustavo Pérez from the disabled list. | Promoted 2B Dale Rogers to Double A Harlingen. | Promoted SS Norberto Rodríguez to Double A Harlingen. | Received LF Darrel Barry from Double A Harlingen. | Received CF Emery Noble from Double A Harlingen. | Drafted MR Juan Sánchez in the 1957 first-year player draft (Round 6, Pick 7, 94th overall pick). | Drafted CF Bryan Bishop in the 1957 first-year player draft (Round 7, Pick 7, 110th overall pick). | Drafted 2B Shannon Crouch in the 1957 first-year player draft (Round 8, Pick 7, 126th overall pick). | Drafted MR Justin Hamm in the 1957 first-year player draft (Round 9, Pick 7, 142nd overall pick). | Drafted MR Bill Roy in the 1957 first-year player draft (Round 10, Pick 7, 158th overall pick). | Promoted CF Emery Noble to Double A Harlingen. | Received 2B Manuel López from Double A Harlingen. | Monday, May 27th, 1957 | Activated MR Júlio Gonzáles from the disabled list. | Saturday, May 25th, 1957 | Placed RF Gustavo Pérez on the 15-day disabled list. | Sunday, May 12th, 1957 | Placed MR Júlio Gonzáles on the 15-day disabled list. | |
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