| Wednesday, June 15th, 1955 | Released 1B Júlio Montalvo. | Released SS John Hobbs. | Released 3B Felipe Valdéz. | Promoted MR Bill Littles to Double A Alice. | Promoted MR Juan Molina to Double A Alice. | Promoted CL Pedro Martínez to Double A Alice. | Received SP Dan Jones from Double A Alice. | Received MR Bill Littles from Double A Alice. | Drafted MR Jack Muńóz in the 1955 first-year player draft (Round 6, Pick 4, 93rd overall pick). | Drafted 3B Ed Hall in the 1955 first-year player draft (Round 7, Pick 4, 110th overall pick). | Drafted 2B Luis León in the 1955 first-year player draft (Round 8, Pick 4, 126th overall pick). | Drafted SP José Vázquez in the 1955 first-year player draft (Round 10, Pick 4, 158th overall pick). | Monday, April 25th, 1955 | Activated SP António Ramírez from the disabled list. | Thursday, December 23rd, 1954 | Activated MR Tsuneari Sugano from the disabled list. | Wednesday, December 15th, 1954 | Activated MR Larry Hill from the disabled list. | Tuesday, November 30th, 1954 | Placed MR Tsuneari Sugano on the 15-day disabled list. | Placed MR Larry Hill on the 15-day disabled list. | |
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