| Saturday, July 25th, 1959 | Placed SP Ben Sánchez on the 15-day disabled list. | Monday, June 15th, 1959 | Promoted SS Luis López to Double A Laredo. | Received SS Raúl Cervantes from Double A Laredo. | Promoted SS Raúl Cervantes to Double A Laredo. | Received 2B Luis López from Double A Laredo. | Promoted RF Matthew McClellan to Double A Laredo. | Received SS Raúl Cervantes from Double A Laredo. | Drafted SP Jack Summers in the 1959 first-year player draft (Round 6, Pick 10, 97th overall pick). | Drafted MR Ron Harrington in the 1959 first-year player draft (Round 7, Pick 10, 113rd overall pick). | Drafted MR Raúl Molina in the 1959 first-year player draft (Round 8, Pick 10, 129th overall pick). | Drafted SP José Gómez in the 1959 first-year player draft (Round 9, Pick 10, 145th overall pick). | Drafted SP Kip Miles in the 1959 first-year player draft (Round 10, Pick 10, 161st overall pick). | Sunday, June 14th, 1959 | Activated SS Luis López from the disabled list. | Friday, June 12th, 1959 | Activated SP Ben Sánchez from the disabled list. | Thursday, May 14th, 1959 | Placed 1B Pancho Cortéz on the 15-day disabled list. | Thursday, April 16th, 1959 | Placed SP Ben Sánchez on the 15-day disabled list. | Friday, September 26th, 1958 | Activated SP William Jensen from the disabled list. | Sunday, September 21st, 1958 | Released 3B Jim Evans. | Friday, September 19th, 1958 | Released 3B Pat Hutton. | Thursday, September 4th, 1958 | Signed Manager Rodrigo López to a 2-year contract extension. | Signed Pitching Coach José Díaz to a 1-year contract extension. | |
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