| Tuesday, June 17th, 1958 | Activated SS José Mercado from the disabled list. | Sunday, February 16th, 1958 | Activated MR Curro Guerrero from the disabled list. | Saturday, October 19th, 1957 | Received C Joe Keys from Major League Level Chicago. | Wednesday, September 4th, 1957 | RF John Brown retires. | Signed Pitching Coach Don Duncan to a 1-year contract extension. | |
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