| Monday, August 29th, 1955 | Activated SP Tony Aguilar from the disabled list. | Wednesday, July 20th, 1955 | Released RF Pedro Mota. | Wednesday, June 15th, 1955 | Released 3B Bob Lord. | Released LF David Larson. | Promoted 3B Arturo Ángel to Double A Victoria. | Received RF Damon Lee from Double A Victoria. | Drafted RF Mike Carney in the 1955 first-year player draft (Round 6, Pick 14, 103rd overall pick). | Drafted 1B Albert López in the 1955 first-year player draft (Round 7, Pick 14, 120th overall pick). | Drafted C Emílio Maes in the 1955 first-year player draft (Round 8, Pick 14, 136th overall pick). | Drafted SP Alan Brooks in the 1955 first-year player draft (Round 9, Pick 14, 152nd overall pick). | Drafted C John Crosby in the 1955 first-year player draft (Round 10, Pick 14, 168th overall pick). | Promoted RF Damon Lee to Double A Victoria. | Received 3B Arturo Ángel from Double A Victoria. | Thursday, May 5th, 1955 | Placed CL San-gui Quan on the 15-day disabled list. | Placed SS José García on the 15-day disabled list. | Thursday, November 11th, 1954 | Activated SP San-gui Quan from the disabled list. | Monday, September 20th, 1954 | Activated CF Kevin Stewart from the disabled list. | |
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