| Thursday, August 7th, 1980 | Placed MR Manny Baltiérrez on the 15-day disabled list. | Monday, July 28th, 1980 | Activated SS Glen Taylor from the disabled list. | Friday, July 18th, 1980 | Placed C Richard Hunt on the 15-day disabled list. | Sunday, July 13th, 1980 | Placed SS Glen Taylor on the 15-day disabled list. | Saturday, July 12th, 1980 | Placed 3B Adrián Rivas on the 15-day disabled list. | Saturday, June 28th, 1980 | Placed SP Dave Crane on the 15-day disabled list. | Monday, June 23rd, 1980 | Activated CF José Ledesma from the disabled list. | Saturday, May 31st, 1980 | Placed CF José Ledesma on the 15-day disabled list. | Friday, May 23rd, 1980 | Activated C Holden O'Bryan from the disabled list. | Thursday, May 8th, 1980 | Placed C Holden O'Bryan on the 15-day disabled list. | Wednesday, April 16th, 1980 | Placed SS Glen Taylor on the 15-day disabled list. | Saturday, August 25th, 1979 | SP R.J. Brown retires. | Signed Pitching Coach Felipe Silva to a 2-year contract extension. | |
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