| Friday, September 22nd, 1978 | Placed 2B Pepe Rodríguez on the 9-day disabled list. | Sunday, August 13th, 1978 | Signed Noah Gibson to a minor league contract with a signing bonus of $24,200. | Thursday, August 10th, 1978 | Signed César López to a minor league contract with a signing bonus of $181,000. | Monday, August 7th, 1978 | Signed Max Clark to a minor league contract with a signing bonus of $19,800. | Monday, July 17th, 1978 | Signed Luis Sánchez to a minor league contract with a signing bonus of $89,500. | Wednesday, June 28th, 1978 | Activated MR Veiko Harju from the disabled list. | MR José García was designated for assignment and placed on waivers (from active). | Saturday, June 24th, 1978 | Placed SS José Bueno on the 60-day disabled list. | Thursday, June 8th, 1978 | Placed RF Kian Mountford on the 60-day disabled list. | Friday, March 24th, 1978 | Placed LF Arturo López on the 60-day disabled list. | Sunday, November 6th, 1977 | Signed bench coach Juan Medellín to a 5-year, $79,700 per year contract. | Sunday, October 9th, 1977 | Signed scouting director Jim Harris to a 3-year, $43,100 per year contract. | |
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