| Tuesday, August 23rd, 1955 | Activated LF John Hunt from the disabled list. | Friday, August 5th, 1955 | Activated CF Dani Sánchez from the disabled list. | Saturday, July 16th, 1955 | Placed CF Dani Sánchez on the 15-day disabled list. | Saturday, June 18th, 1955 | Activated MR Ángel Hernández from the disabled list. | Wednesday, June 15th, 1955 | Drafted CF Juan Jose Moreno in the 1955 first-year player draft (Round 6, Pick 13, 102nd overall pick). | Drafted SP Joe Posner in the 1955 first-year player draft (Round 7, Pick 13, 119th overall pick). | Drafted SS Mario Espinosa in the 1955 first-year player draft (Round 8, Pick 13, 135th overall pick). | Drafted SS Jesús Vázquez in the 1955 first-year player draft (Round 9, Pick 13, 151st overall pick). | Drafted LF Danny Shaw in the 1955 first-year player draft (Round 10, Pick 13, 167th overall pick). | Monday, May 30th, 1955 | Activated MR Bob Hart from the disabled list. | |
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