| Thursday, June 20th, 1957 | Activated SP William Jensen from the disabled list. | Saturday, June 15th, 1957 | Released 2B Iván Mejía. | Promoted SP Mike Brooks to Double A Laredo. | Received SP Hugo Hunter from Double A Laredo. | Drafted RF Tim Ross in the 1957 first-year player draft (Round 7, Pick 1, 104th overall pick). | Drafted MR Xavier Guardado in the 1957 first-year player draft (Round 8, Pick 1, 120th overall pick). | Drafted SP Ray Cotten in the 1957 first-year player draft (Round 10, Pick 1, 152nd overall pick). | Placed SS Jeff Womack on the 15-day disabled list. | Wednesday, June 5th, 1957 | Placed SP William Jensen on the 15-day disabled list. | Sunday, May 26th, 1957 | Placed SP Oliver Clark on the 15-day disabled list. | Wednesday, May 22nd, 1957 | Placed CF Joseph Smith on the 15-day disabled list. | Saturday, April 27th, 1957 | Activated SS Jeff Womack from the disabled list. | Saturday, November 17th, 1956 | Activated MR Dave McElroy from the disabled list. | Saturday, October 13th, 1956 | Activated SP Oliver Clark from the disabled list. | |
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