| Sunday, August 10th, 1980 | Placed SS Neil Shirley on the 15-day disabled list. | Saturday, July 26th, 1980 | Placed RF Todd Richards on the 15-day disabled list. | Placed SP John Murphy on the 15-day disabled list. | Monday, July 21st, 1980 | Placed RF Jon Morton on the 15-day disabled list. | Saturday, July 12th, 1980 | Activated 1B Bill Riley from the disabled list. | Friday, June 27th, 1980 | Activated CF Geoffrey Sharpe from the disabled list. | Tuesday, June 17th, 1980 | Placed 1B Bill Riley on the 15-day disabled list. | Sunday, June 15th, 1980 | Drafted MR Vic McCarty in the 1980 first-year player draft (Round 7, Pick 1, 126th overall pick). | Drafted LF Javier Flores in the 1980 first-year player draft (Round 8, Pick 1, 146th overall pick). | Drafted SP César Colón in the 1980 first-year player draft (Round 9, Pick 1, 166th overall pick). | Drafted SS Jim Patterson in the 1980 first-year player draft (Round 10, Pick 1, 186th overall pick). | Promoted SS Neil Shirley to Double A Brownsville. | Tuesday, June 3rd, 1980 | Placed CF Geoffrey Sharpe on the 15-day disabled list. | Friday, May 2nd, 1980 | Activated CF Theron Robison from the disabled list. | Thursday, April 17th, 1980 | Placed CF Theron Robison on the 15-day disabled list. | Thursday, August 23rd, 1979 | Signed Manager Jesús Maldonado to a 3-year contract extension. | |
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