| Thursday, July 17th, 1980 | Placed MR Dominic Byrd on the 15-day disabled list. | Wednesday, July 16th, 1980 | Activated 1B José Ortíz from the disabled list. | Thursday, June 26th, 1980 | Placed SP Brian Hicks on the 15-day disabled list. | Monday, June 23rd, 1980 | Activated LF Chris Henry from the disabled list. | Saturday, June 21st, 1980 | Placed 1B José Ortíz on the 15-day disabled list. | Wednesday, June 18th, 1980 | Placed SP Julius Powell on the 15-day disabled list. | Saturday, June 14th, 1980 | Activated 1B Rob Eckersley from the disabled list. | Sunday, June 8th, 1980 | Placed LF Chris Henry on the 15-day disabled list. | Thursday, May 15th, 1980 | Activated CF Ju-ao Loong from the disabled list. | Friday, April 18th, 1980 | Placed CF Robert Moore on the 15-day disabled list. | Thursday, February 21st, 1980 | Received CL Sam Long from Major League Level Cleveland. | Monday, September 3rd, 1979 | Signed Manager Bill Langley to a 1-year contract extension. | Signed Pitching Coach Tomás Ibarra to a 1-year contract extension. | |
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