| Friday, July 25th, 1980 | Activated RF Rich Butler from the disabled list. | Activated CF David Carter from the disabled list. | Thursday, July 10th, 1980 | Placed CF David Carter on the 15-day disabled list. | Saturday, June 21st, 1980 | Placed RF Rich Butler on the 15-day disabled list. | Sunday, June 15th, 1980 | Drafted MR Sergio Herrera in the 1980 first-year player draft (Round 6, Pick 10, 114th overall pick). | Drafted CF Rich Butler in the 1980 first-year player draft (Round 7, Pick 10, 135th overall pick). | Drafted SP Mike Schrimsher in the 1980 first-year player draft (Round 8, Pick 10, 155th overall pick). | Drafted 3B Sancho Robles in the 1980 first-year player draft (Round 9, Pick 10, 175th overall pick). | Drafted SP Simon Rosser in the 1980 first-year player draft (Round 10, Pick 10, 195th overall pick). | Saturday, June 7th, 1980 | Activated 3B Edward Hall from the disabled list. | Friday, May 23rd, 1980 | Placed 3B Edward Hall on the 15-day disabled list. | Thursday, December 6th, 1979 | Signed hitting coach Ken Smith. | Wednesday, December 5th, 1979 | Activated 3B Edward Hall from the disabled list. | Monday, October 1st, 1979 | HC Lucas Barton retires. | Thursday, August 23rd, 1979 | Signed Hitting Coach Lucas Barton to a 1-year contract extension. | Released RF Juan Reyes. | |
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