| Saturday, June 15th, 1957 | Drafted MR Jorge Flores in the 1957 first-year player draft (Round 7, Pick 3, 106th overall pick). | Drafted SS León Franco in the 1957 first-year player draft (Round 8, Pick 3, 122nd overall pick). | Drafted 3B Dwight Sims in the 1957 first-year player draft (Round 10, Pick 3, 154th overall pick). | Promoted 2B Nick Smith to Double A San Antonio. | Received LF Lorenzo Camacho from Double A San Antonio. | Sunday, June 9th, 1957 | Activated MR Leo Noble from the disabled list. | Sunday, June 2nd, 1957 | Placed SP Sergio Rosa on the 15-day disabled list. | Saturday, May 25th, 1957 | Placed MR Leo Noble on the 15-day disabled list. | Wednesday, April 17th, 1957 | Placed RF Andre Peters on the 15-day disabled list. | Sunday, November 11th, 1956 | Activated SP Jesús Castillo from the disabled list. | Thursday, November 8th, 1956 | Activated SP Richard Johnson from the disabled list. | Saturday, November 3rd, 1956 | Activated RF Juan Mallorca from the disabled list. | Tuesday, October 23rd, 1956 | Placed SP Jesús Castillo on the 15-day disabled list. | |
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