| Wednesday, September 17th, 1958 | Activated SS Willie Murray from the disabled list. | Monday, September 15th, 1958 | Activated CF Orlando Juárez from the disabled list. | Wednesday, August 20th, 1958 | Placed SP Kelly Lowery on the 60-day disabled list. | Tuesday, August 12th, 1958 | Signed Alberto Pérez to a minor league contract with a signing bonus of $80,200. | Monday, August 11th, 1958 | Signed José Valéncia to a minor league contract with a signing bonus of $14,100. | Friday, July 4th, 1958 | Activated 3B Hideki Akiyama from the disabled list. | SS Fred Eisenhauer was designated for assignment and placed on irrevocable waivers. | Tuesday, October 29th, 1957 | Signed manager Ronnie Richardson to a 4-year, $20,800 per year contract. | |
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