| Saturday, September 20th, 1980 | Activated SP Leonard Donnelly from the 60-day disabled list. | MR Wally Hickman was designated for assignment, placed on waivers and taken off the 40-man roster. | Wednesday, September 17th, 1980 | Activated 3B Tyler Anderson from the disabled list. | Sunday, August 31st, 1980 | Purchased the contract of SP Adam Finch from Triple A Walnut Grove. | SP Adam Perkins was designated for assignment, placed on waivers and taken off the 40-man roster. | Saturday, August 16th, 1980 | Signed manager Vincente Ortíz to a 4-year, $57,700 per year contract. | Thursday, August 14th, 1980 | Failed to sign 2nd round draft pick Rodrigo Santiago. | Tuesday, August 12th, 1980 | Placed SP Steve Clark on waivers. | Monday, August 11th, 1980 | Signed Jim Tolbert to a minor league contract with a signing bonus of $91,400. | Signed Brent White to a minor league contract with a signing bonus of $45,700. | Saturday, July 26th, 1980 | Signed 1st round draft pick César Garza for a signing bonus of $803,400 and a 2-year major league contract worth a total of $1,606,800. | Monday, July 7th, 1980 | Signed Fred Hall to a minor league contract with a signing bonus of $21,300. | Wednesday, May 7th, 1980 | Activated SP Steve Clark from the disabled list. | Placed SP Liben Hakimi on the 9-day disabled list. | Saturday, April 19th, 1980 | Purchased the contract of SP Adam Perkins from Double A Greensboro. | SP Miguel Moreno was designated for assignment, placed on waivers and taken off the 40-man roster. | Monday, April 14th, 1980 | Purchased the contract of SP Miguel Moreno from Triple A Walnut Grove. | SP Jason Brady was designated for assignment, placed on waivers and taken off the 40-man roster. | Tuesday, January 8th, 1980 | Activated SP Leonard Donnelly from the 60-day disabled list. | SP Jason Brady was designated for assignment, placed on waivers and taken off the 40-man roster. | Monday, October 15th, 1979 | Signed hitting coach Ramón López to a 4-year, $56,000 per year contract. | Saturday, October 13th, 1979 | Signed general manager Dean Townsend to a 5-year, $88,900 per year contract. | |
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