| Sunday, June 29th, 1980 | Activated SP Dave Meredith from the disabled list. | Sunday, June 22nd, 1980 | Placed SS Earl Quick on the 15-day disabled list. | Saturday, June 21st, 1980 | Placed 1B Leland Rigney on the 15-day disabled list. | Saturday, June 14th, 1980 | Placed SP Dave Meredith on the 15-day disabled list. | Thursday, June 5th, 1980 | Activated SP Salvador García from the disabled list. | Sunday, May 4th, 1980 | Placed SP Salvador García on the 15-day disabled list. | Friday, May 2nd, 1980 | Placed SP Dave Meredith on the 15-day disabled list. | Wednesday, September 12th, 1979 | Signed hitting coach Júlio Trevino. | Saturday, August 25th, 1979 | CL Curt Melton retires. | MA Clancy McFarland retires. | Signed Pitching Coach Wilford Larson to a 1-year contract extension. | |
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