| Friday, September 26th, 1980 | Activated C Carlos Ronceros from the disabled list. | Sunday, September 14th, 1980 | Placed C Carlos Ronceros on the 9-day disabled list. | Thursday, September 4th, 1980 | Activated SS Emílio Martínez from the disabled list. | Wednesday, September 3rd, 1980 | Activated LF Tim Harsh from the 60-day disabled list. | Activated SS Roberto Uribes from the disabled list. | Thursday, August 14th, 1980 | Failed to sign 2nd round draft pick Keitaro Nakao. | Monday, August 11th, 1980 | Signed Dewitt Powell to a minor league contract with a signing bonus of $25,900. | Friday, August 8th, 1980 | Demoted 2B José Gómez to Triple A Pickering. | Signed Jesús Castillo to a minor league contract with a signing bonus of $530,100. | Signed Alex Jennings to a minor league contract with a signing bonus of $57,800. | Monday, August 4th, 1980 | Signed Rafael Hernández to a minor league contract with a signing bonus of $129,500. | Saturday, July 19th, 1980 | Signed Dennis Downing to a minor league contract with a signing bonus of $25,800. | Thursday, March 27th, 1980 | Placed 2B Wilson Rodríguez on the 9-day disabled list. | Wednesday, November 7th, 1979 | Signed bench coach Elliot McCaw to a 5-year, $112,000 per year contract. | |
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