| Wednesday, May 29th, 1957 | Activated RF Adrián Roa from the disabled list. | Sunday, October 28th, 1956 | Released SP Millard Simon.(Career-ending injury) | Wednesday, October 10th, 1956 | Released CL Bernardo Castro.(Career-ending injury) | Monday, September 3rd, 1956 | Manager Robert Gray leaves the team, his contract was not renewed. | Signed Pitching Coach Miguel Rodríguez to a 2-year contract extension. | |
|