| Wednesday, September 10th, 1980 | Fired manager Ángel Pinto. | Sunday, September 7th, 1980 | Activated RF Leonard O'Hoolighan from the 60-day disabled list. | SS Ricardo Cruz was designated for assignment, placed on waivers and taken off the 40-man roster. | Tuesday, August 12th, 1980 | Signed Manny Rúbio to a minor league contract with a signing bonus of $221,500. | Monday, August 11th, 1980 | Signed Guillermo Soto to a minor league contract with a signing bonus of $36,000. | Sunday, July 27th, 1980 | Placed RF Nam-cheol Kim on the 60-day disabled list. | Wednesday, July 16th, 1980 | Signed Henry Miller to a minor league contract with a signing bonus of $104,100. | Monday, June 23rd, 1980 | Activated MR Glen McRae from the disabled list. | MR Ron Puckett was designated for assignment and placed on waivers (from active). | Thursday, March 27th, 1980 | Placed 1B Eduardo Jiménez on the 9-day disabled list. | Saturday, October 6th, 1979 | Signed manager Ángel Pinto to a 5-year, $132,400 per year contract. | |
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