| Saturday, August 10th, 1957 | Placed 2B Luis Olivarez on the 15-day disabled list. | Monday, July 29th, 1957 | Placed SP Jesús Arredondo on the 15-day disabled list. | Sunday, July 28th, 1957 | Released 3B Joe McRae. | Wednesday, July 3rd, 1957 | Placed CL Reed Wilson on the 15-day disabled list. | Wednesday, June 26th, 1957 | Activated 1B Cristián Díaz from the disabled list. | Saturday, June 15th, 1957 | Released 3B Britt Greer. | Promoted 2B Michael Smith to Double A McAllen. | Received RF Nelson Luna from Double A McAllen. | Promoted CF Nelson Luna to Double A McAllen. | Received CF Forest Jones from Double A McAllen. | Drafted MR Juan Morán in the 1957 first-year player draft (Round 6, Pick 16, 103rd overall pick). | Drafted 2B Michael Callahan in the 1957 first-year player draft (Round 7, Pick 16, 119th overall pick). | Drafted SP Juan Allen in the 1957 first-year player draft (Round 8, Pick 16, 135th overall pick). | Drafted C Rafael Gómez in the 1957 first-year player draft (Round 9, Pick 16, 151st overall pick). | Drafted MR Evan Roberts in the 1957 first-year player draft (Round 10, Pick 16, 167th overall pick). | Monday, June 10th, 1957 | Released 3B Ken Smith. | Saturday, April 20th, 1957 | Received SS Thu Vu from Double A McAllen. | Sunday, November 18th, 1956 | Activated SP Carlos Rúbio from the disabled list. | Thursday, October 11th, 1956 | Activated MR Jit wei Shang from the disabled list. | Sunday, September 2nd, 1956 | Activated CF Salvador Rangel from the disabled list. | |
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