| Friday, August 21st, 1959 | Placed 2B Milton Graham on the 15-day disabled list. | Monday, June 15th, 1959 | Promoted CF Ken Slocum to Double A Harlingen. | Promoted LF Bryan Bishop to Double A Harlingen. | Received 3B Curt Lee from Double A Harlingen. | Released 3B Curt Lee. | Promoted SP Bob Larsen to Triple A Brantford. | Promoted 2B Tomás Flores to Double A Harlingen. | Received SP Ray Thomas from Triple A Brantford. | Received LF Bryan Bishop from Double A Harlingen. | Drafted SP Juan Muñóz in the 1959 first-year player draft (Round 6, Pick 15, 102nd overall pick). | Drafted CF Andrew Eaton in the 1959 first-year player draft (Round 7, Pick 15, 118th overall pick). | Drafted MR Matt Clark in the 1959 first-year player draft (Round 8, Pick 15, 134th overall pick). | Drafted 2B Brian Becker in the 1959 first-year player draft (Round 9, Pick 15, 150th overall pick). | Drafted MR Andy Davis in the 1959 first-year player draft (Round 10, Pick 15, 166th overall pick). | Promoted CF Bryan Bishop to Double A Harlingen. | Received 1B Luis Rodríguez from Double A Harlingen. | Thursday, June 4th, 1959 | Placed MR Pedro Corona on the 15-day disabled list. | Monday, October 20th, 1958 | Activated SP Foppe van Kooten from the disabled list. | Sunday, October 5th, 1958 | Activated SP Jesús Castillo from the disabled list. | Monday, September 15th, 1958 | Released 3B Phil Hall. | |
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