| Tuesday, August 16th, 1966 | Released 3B Juan Peña. | Wednesday, July 20th, 1966 | Activated SP Eric Chambers from the disabled list. | Wednesday, June 15th, 1966 | Promoted C Jeremiah Steward to Double A Galveston. | Promoted C Nathan Clark to Double A Galveston. | Received C Greg Hahn from Double A Galveston. | Received 2B Cisco Ramírez from Double A Galveston. | Drafted 2B Franklin Terry in the 1966 first-year player draft (Round 6, Pick 12, 105th overall pick). | Drafted CF Jorge Núñez in the 1966 first-year player draft (Round 7, Pick 12, 123rd overall pick). | Drafted 1B Ron Wilson in the 1966 first-year player draft (Round 8, Pick 12, 141st overall pick). | Drafted LF Ki-heung Kim in the 1966 first-year player draft (Round 9, Pick 12, 159th overall pick). | Drafted LF Jim Anderson in the 1966 first-year player draft (Round 10, Pick 12, 177th overall pick). | Thursday, June 2nd, 1966 | Placed C Anthony Gilbert on the 15-day disabled list. | Friday, May 27th, 1966 | Activated 2B Álex Franco from the disabled list. | Sunday, May 8th, 1966 | Placed 2B Álex Franco on the 15-day disabled list. | Saturday, April 30th, 1966 | Activated LF Fernando García from the disabled list. | Friday, April 15th, 1966 | Placed LF Fernando García on the 15-day disabled list. | Saturday, September 4th, 1965 | Activated CF Ricardo Chávez from the disabled list. | Thursday, September 2nd, 1965 | Activated RF Javier Delvalle from the disabled list. | |
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