| Tuesday, July 30th, 1957 | Activated CL San-gui Quan from the disabled list. | Friday, July 19th, 1957 | Placed SP Marvin Hicks on the 15-day disabled list. | Saturday, July 13th, 1957 | Placed SP Jesús Castillo on the 15-day disabled list. | Thursday, July 11th, 1957 | Activated RF Nelson Juárez from the disabled list. | Thursday, July 4th, 1957 | Activated LF Napoleon Cuoco from the disabled list. | Saturday, June 15th, 1957 | Promoted SP Carlos Rodríguez to Double A Freeport. | Promoted SS Eduardo Flores to Double A Freeport. | Received SP Joe Michaelis from Double A Freeport. | Received CF Don Christensen from Double A Freeport. | Promoted SP Juan Morales to Double A Freeport. | Received SP Vittorio Lucciardi from Double A Freeport. | Drafted RF Jimmy Webb in the 1957 first-year player draft (Round 6, Pick 4, 91st overall pick). | Drafted C Jack Webb in the 1957 first-year player draft (Round 7, Pick 4, 107th overall pick). | Drafted C José García in the 1957 first-year player draft (Round 8, Pick 4, 123rd overall pick). | Drafted 1B Jean Desroches in the 1957 first-year player draft (Round 9, Pick 4, 139th overall pick). | Drafted SP Jamie Wilson in the 1957 first-year player draft (Round 10, Pick 4, 155th overall pick). | Monday, June 10th, 1957 | Placed LF Napoleon Cuoco on the 15-day disabled list. | Friday, May 31st, 1957 | Placed RF Nelson Juárez on the 15-day disabled list. | Sunday, May 19th, 1957 | Placed CL San-gui Quan on the 15-day disabled list. | Saturday, March 9th, 1957 | Placed 1B Pablo Valdés on the 15-day disabled list. | Wednesday, November 21st, 1956 | Placed 1B Rod Brady on the 15-day disabled list. | Monday, August 27th, 1956 | LF Nick Sweet retires. | Signed Hitting Coach Aaron Price to a 3-year contract extension. | |
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