| Thursday, October 15th, 1959 | Signed free agent 2B Pedro Márquez to a 2-year contract worth a total of $86,600. | Tuesday, October 13th, 1959 | Activated 3B Tony Velásquez from the disabled list. | Monday, October 5th, 1959 | Placed RF Mike Nadler on the 15-day disabled list. | Friday, October 2nd, 1959 | Placed LF Vincent George on the 15-day disabled list. | Thursday, September 24th, 1959 | Activated LF Bill Rogers from the disabled list. | Wednesday, September 23rd, 1959 | Placed LF Jeff Smith on waivers. | Thursday, September 10th, 1959 | Placed 3B Tony Velásquez on the 15-day disabled list. | Wednesday, August 26th, 1959 | Placed LF Jeff Smith on waivers. | Tuesday, August 25th, 1959 | RF Takahiro Nemoto was designated for assignment and placed on waivers (from active). | Friday, August 14th, 1959 | Failed to sign 1st round draft pick Juan Ríos. | Thursday, August 13th, 1959 | Signed Francisco Gonzáles to a minor league contract with a signing bonus of $7,000. | Tuesday, August 11th, 1959 | Signed Mario Díaz to a minor league contract with a signing bonus of $27,500. | Monday, August 10th, 1959 | Signed Mario Hernández to a minor league contract with a signing bonus of $17,000. | Friday, July 17th, 1959 | Activated SP Donald Wagner from the disabled list. | SP Domingo García was designated for assignment and placed on irrevocable waivers. | Thursday, March 26th, 1959 | Placed CF Michael Clark on the 15-day disabled list. | Monday, March 23rd, 1959 | Placed 1B Joe Adams on the 15-day disabled list. | Friday, November 14th, 1958 | Signed free agent MR Juan Martínez to a 1-year contract worth a total of $12,500. | MR Roberto Hernández was designated for assignment and placed on waivers (from active). | Saturday, November 8th, 1958 | Activated CF Michael Clark from the 60-day disabled list. | RF Vincent George was designated for assignment and placed on irrevocable waivers. | Thursday, October 23rd, 1958 | Activated LF Jeff Smith from the disabled list. | RF Takahiro Nemoto was designated for assignment and placed on waivers (from active). | |
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