| Friday, August 25th, 1978 | Activated LF Carlos Vásquez from the disabled list. | Wednesday, August 9th, 1978 | Activated LF Neil Norris from the disabled list. | Tuesday, August 8th, 1978 | Placed SP Jeffrey Bates on the 15-day disabled list. | Thursday, July 27th, 1978 | Placed SS Roberto Castillo on the 15-day disabled list. | Friday, June 30th, 1978 | Activated SS Víctor Martínez from the disabled list. | Thursday, June 15th, 1978 | Promoted CL Igor Jasansky to Double A Greensboro. | Promoted SP William Collier to Double A Greensboro. | Promoted SS José Matos to Double A Greensboro. | Promoted 3B Cullen Stevenson to Double A Greensboro. | Received C Felipe Delgado from Double A Greensboro. | Received CF Eduardo De Jesús from Double A Greensboro. | Drafted SP Alan Mann in the 1978 first-year player draft (Round 6, Pick 13, 118th overall pick). | Drafted 3B Will Bass in the 1978 first-year player draft (Round 7, Pick 13, 138th overall pick). | Drafted MR Ray Kaiser in the 1978 first-year player draft (Round 8, Pick 13, 158th overall pick). | Drafted RF Carlos Vásquez in the 1978 first-year player draft (Round 9, Pick 13, 178th overall pick). | Drafted SP Pedro Gómez in the 1978 first-year player draft (Round 10, Pick 13, 198th overall pick). | Sunday, June 4th, 1978 | Placed SS Víctor Martínez on the 15-day disabled list. | Tuesday, April 11th, 1978 | Placed MR Jeff Cook on the 15-day disabled list. | Thursday, August 25th, 1977 | Signed Pitching Coach José Pérez to a 3-year contract extension. | |
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