| Sunday, July 10th, 1966 | Activated SP Keith Brooks from the disabled list. | Wednesday, June 15th, 1966 | Promoted SP Pedro Reyes to Double A Austin. | Promoted SP Earnest McGlasrich to Double A Austin. | Received SP Matt Wellburn from Double A Austin. | Received SP Sam Riggs from Double A Austin. | Drafted 3B António Flores in the 1966 first-year player draft (Round 6, Pick 5, 98th overall pick). | Drafted C Jaime Pérez in the 1966 first-year player draft (Round 7, Pick 5, 116th overall pick). | Drafted C Ángel Castro in the 1966 first-year player draft (Round 8, Pick 5, 134th overall pick). | Drafted SP Ernest Watkins in the 1966 first-year player draft (Round 9, Pick 5, 152nd overall pick). | Drafted 1B Greg Silver in the 1966 first-year player draft (Round 10, Pick 5, 170th overall pick). | Thursday, May 12th, 1966 | Released 1B Bob Moss. | Saturday, March 19th, 1966 | Released 3B Dan Garner. | Tuesday, February 8th, 1966 | Released CF Jeff Lane. | Wednesday, October 13th, 1965 | MR Sergio Marino becomes a free-agent. | Sunday, October 10th, 1965 | Activated CF Alfredo Ortíz from the disabled list. | Tuesday, September 7th, 1965 | Activated 3B Tony Cervantes from the disabled list. | Monday, August 30th, 1965 | Activated LF Jesús Pérez from the disabled list. | |
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