| Tuesday, October 7th, 1958 | Activated MR Enrique Soto from the 60-day disabled list. | Sunday, September 14th, 1958 | Placed SP Rod Davis on the 60-day disabled list. | Saturday, August 9th, 1958 | Signed Raúl Rodríguez to a minor league contract with a signing bonus of $5,100. | Friday, August 8th, 1958 | Signed Johnny Shelton to a minor league contract with a signing bonus of $12,000. | Thursday, August 7th, 1958 | Signed Pedro López to a minor league contract with a signing bonus of $17,600. | Signed Lorenzo Torres to a minor league contract with a signing bonus of $5,400. | Placed 2B Jorge Alvarado on waivers. | Sunday, June 29th, 1958 | Activated CF José Flores from the disabled list. | RF Bruno Paul was designated for assignment and placed on irrevocable waivers. | Wednesday, May 28th, 1958 | Activated CF Roberto Núñez from the disabled list. | RF Carlos Alfmana was designated for assignment and placed on irrevocable waivers. | Wednesday, January 1st, 1958 | Recalled CL Jit wei Shang from Triple A Ajax. | MR Brody Norman was designated for assignment and placed on waivers (from active). | Saturday, November 23rd, 1957 | Activated RF Leonard Oglethorpe from the 60-day disabled list. | RF Salvador González was designated for assignment and placed on waivers (from active). | Friday, November 15th, 1957 | Signed bench coach Sean Mayer to a 4-year, $19,300 per year contract. | |
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