| Sunday, August 21st, 1955 | Placed SP Justin Porter on the 15-day disabled list. | Wednesday, August 10th, 1955 | Released 3B Ron Young. | Wednesday, July 27th, 1955 | Activated 3B Clark Richards from the disabled list. | Tuesday, July 5th, 1955 | Placed SP Lee Mayfield on the 15-day disabled list. | Wednesday, June 15th, 1955 | Activated SS Clark Richards from the disabled list. | Promoted MR John McClain to Double A Brownsville. | Received SP Sonny Griffin from Triple A Hamilton. | Drafted MR Juan Gonzáles in the 1955 first-year player draft (Round 7, Pick 2, 108th overall pick). | Drafted 1B Pablo Valdés in the 1955 first-year player draft (Round 8, Pick 2, 124th overall pick). | Drafted SP William Jackson in the 1955 first-year player draft (Round 9, Pick 2, 140th overall pick). | Drafted 1B Victor Robinson in the 1955 first-year player draft (Round 10, Pick 2, 156th overall pick). | Promoted 1B Juan Selvera to Double A Brownsville. | Received RF Nelson Luna from Double A Brownsville. | Tuesday, May 10th, 1955 | Placed SS Clark Richards on the 15-day disabled list. | Monday, November 8th, 1954 | Released SP José Rey. | |
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