| Friday, October 3rd, 1958 | Placed SP Jimmy Belmore on the 15-day disabled list. | Sunday, September 21st, 1958 | Activated 2B Bill Miller from the disabled list. | Friday, September 12th, 1958 | Placed RF Raúl López on waivers. | Thursday, August 14th, 1958 | Failed to sign 9th round draft pick Justin Krieger. | Tuesday, August 12th, 1958 | Signed Ira Walker to a minor league contract with a signing bonus of $6,300. | Monday, August 11th, 1958 | Signed Ken Lewis to a minor league contract with a signing bonus of $5,800. | Tuesday, July 22nd, 1958 | Signed Kunihiko Hayashi to a minor league contract with a signing bonus of $41,400. | Sunday, July 6th, 1958 | Signed Domingo Hernández to a minor league contract with a signing bonus of $13,800. | Monday, June 2nd, 1958 | Activated RF Pablo Márquez from the disabled list. | RF Walter Griffith was designated for assignment and placed on waivers (from active). | Sunday, May 18th, 1958 | Activated 2B Bill Johnson from the disabled list. | 2B Mario Mejía was designated for assignment and placed on irrevocable waivers. | Thursday, April 3rd, 1958 | Placed 2B Gene Roberson on the 60-day disabled list. | Sunday, December 8th, 1957 | Signed free agent 3B Will O'Day to a 1-year contract worth a total of $14,000. | Optioned 2B Mario Mejía to Triple A Uxbridge. | Sunday, November 3rd, 1957 | Signed manager Markus Houston to a 5-year, $21,800 per year contract. | Thursday, October 31st, 1957 | Signed scouting director Miguel Baca to a 5-year, $8,000 per year contract. | Signed hitting coach Cheslav Mamatulin to a 4-year, $9,000 per year contract. | |
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