| Thursday, September 28th, 1978 | Activated SS Darren Payne from the disabled list. | Thursday, September 7th, 1978 | Placed MR Vicente Rivera on the 60-day disabled list. | Sunday, September 3rd, 1978 | Placed SS Darren Payne on the 9-day disabled list. | Thursday, August 24th, 1978 | Placed SS António Ruíz on the 60-day disabled list. | Saturday, August 12th, 1978 | Activated SP Roy Roberts from the 60-day disabled list. | MR Mike Flynn was designated for assignment, placed on waivers and taken off the 40-man roster. | Wednesday, August 9th, 1978 | Signed Harrison Hess to a minor league contract with a signing bonus of $168,900. | Signed José Galindo to a minor league contract with a signing bonus of $34,300. | Monday, July 31st, 1978 | Signed Ernest Charleton to a minor league contract with a signing bonus of $18,300. | Saturday, July 15th, 1978 | Signed Ronald Weber to a minor league contract with a signing bonus of $318,700. | Wednesday, May 17th, 1978 | Placed MR John Cook on the 60-day disabled list. | Saturday, April 1st, 1978 | Placed RF Harry Morgan on the 9-day disabled list. | Wednesday, March 29th, 1978 | Placed 2B Ron Pierce on the 9-day disabled list. | Saturday, October 15th, 1977 | Signed hitting coach Rens Munten to a 5-year, $84,500 per year contract. | |
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