| Wednesday, July 11th, 1956 | Released 3B Alec Dunn. | Saturday, June 30th, 1956 | Released 1B Tony Ball. | Tuesday, June 19th, 1956 | Received SP Tom Mayer from Double A Edna. | Friday, June 15th, 1956 | Promoted MR Cisco Martínez to Double A Edna. | Received SP Felipe Zamora from Double A Edna. | Received 1B Gabriel Roberts from Triple A Oshawa. | Received 1B Manuel Ramos from Triple A Oshawa. | Drafted 3B Fred Gauvin in the 1956 first-year player draft (Round 6, Pick 16, 100th overall pick). | Drafted MR Juan Ramírez in the 1956 first-year player draft (Round 7, Pick 16, 116th overall pick). | Drafted LF Raúl Peńa in the 1956 first-year player draft (Round 8, Pick 16, 132nd overall pick). | Drafted SP Domingo Martínez in the 1956 first-year player draft (Round 9, Pick 16, 148th overall pick). | Drafted C Claudio Castro in the 1956 first-year player draft (Round 10, Pick 16, 164th overall pick). | Sunday, April 8th, 1956 | Received 3B Bob Lord from Double A Edna. | Monday, September 19th, 1955 | Activated CF Dave Hamilton from the disabled list. | |
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