| Saturday, September 27th, 1958 | Activated SP Neal McEver from the 60-day disabled list. | Tuesday, August 12th, 1958 | Signed Keith Nelson to a minor league contract with a signing bonus of $4,200. | Sunday, August 10th, 1958 | Signed Cristóbal Díaz to a minor league contract with a signing bonus of $27,100. | Friday, August 8th, 1958 | Signed Jesús Ramírez to a minor league contract with a signing bonus of $57,100. | Signed Bryant Robinson to a minor league contract with a signing bonus of $16,700. | Monday, June 23rd, 1958 | Activated C Ernest Dickerson from the disabled list. | C Ron Burns was designated for assignment and placed on irrevocable waivers. | Saturday, June 21st, 1958 | Activated RF Kurt Harrington from the disabled list. | RF Mike Mathews was designated for assignment and placed on waivers (from active). | Monday, March 24th, 1958 | Placed SP Paul Dukes on the 15-day disabled list. | Purchased the contract of MR Joe Howell from Triple A St. Catherines. | RF Mike Mathews was designated for assignment, placed on waivers and taken off the 40-man roster. | |
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