| Thursday, July 28th, 1966 | Placed SP Paul Tremblay on the 15-day disabled list. | Wednesday, June 15th, 1966 | Promoted SP Liben Hakimi to Double A Brownsville. | Promoted SP Manny Vińa to Double A Brownsville. | Received MR Juan Valdés from Double A Brownsville. | Received MR Haden Thomas from Double A Brownsville. | Drafted 2B Max Stover in the 1966 first-year player draft (Round 6, Pick 9, 102nd overall pick). | Drafted MR José Morales in the 1966 first-year player draft (Round 7, Pick 9, 120th overall pick). | Drafted LF Murray Irwin in the 1966 first-year player draft (Round 8, Pick 9, 138th overall pick). | Drafted SP John Roe in the 1966 first-year player draft (Round 9, Pick 9, 156th overall pick). | Drafted RF Sergio Gutiérrez in the 1966 first-year player draft (Round 10, Pick 9, 174th overall pick). | Wednesday, May 25th, 1966 | Released 3B Lou Price. | Monday, November 1st, 1965 | Activated C Shawn Hayes from the disabled list. | Wednesday, October 13th, 1965 | LF Eduardo Gómez becomes a free-agent. | Thursday, September 9th, 1965 | Activated MR Mark Whitford from the disabled list. | |
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