| Tuesday, September 9th, 1980 | Activated SP Matt Jones from the disabled list. | Monday, August 11th, 1980 | Signed Esteban Pérez to a minor league contract with a signing bonus of $22,300. | Tuesday, August 5th, 1980 | Activated CF Domingo López from the 60-day disabled list. | RF Pedro Coronado was designated for assignment and placed on waivers (from active). | Friday, August 1st, 1980 | Activated CF Ralph Compton from the disabled list. | LF Lévy Gauthier was designated for assignment and placed on waivers (from active). | Thursday, July 24th, 1980 | Signed 1st round draft pick Miguel López for a signing bonus of $158,500 and a 2-year major league contract worth a total of $317,000. | Saturday, July 12th, 1980 | Signed Elwood Allen to a minor league contract with a signing bonus of $132,600. | Tuesday, July 8th, 1980 | Signed Miguel Torres to a minor league contract with a signing bonus of $22,700. | Wednesday, June 25th, 1980 | Signed Chris Reynolds to a minor league contract with a signing bonus of $42,200. | Monday, June 16th, 1980 | Activated CF Otto Coleman from the disabled list. | LF Lévy Gauthier was designated for assignment and placed on waivers (from active). | Saturday, April 26th, 1980 | Placed CF Otto Coleman on the 9-day disabled list. | Purchased the contract of RF Rob Clay from Triple A Oshawa. | Tuesday, March 25th, 1980 | Activated 3B Robert Nelson from the disabled list. | Saturday, March 15th, 1980 | Placed 3B Robert Nelson on the 9-day disabled list. | Sunday, November 11th, 1979 | Signed bench coach Ángel Nieves to a 4-year, $96,900 per year contract. | Monday, October 1st, 1979 | Bench Coach Daniel Villegas leaves the team, his contract was not renewed. | Signed Team Trainer Dan Palmer to a 2-year contract extension. | |
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