| Thursday, September 29th, 1955 | Activated SP Dave Chandler from the 60-day disabled list. | Tuesday, August 23rd, 1955 | Activated LF Pablo Márquez from the disabled list. | RF Domingo Valdés was designated for assignment and placed on irrevocable waivers. | Friday, August 12th, 1955 | Signed Ron Franzen to a minor league contract with a signing bonus of $3,000. | Thursday, August 11th, 1955 | Signed Martín Paz to a minor league contract with a signing bonus of $10,500. | Monday, August 8th, 1955 | Signed Tony McKinley to a minor league contract with a signing bonus of $2,800. | Thursday, August 4th, 1955 | Activated RF Domingo Valdés from the disabled list. | LF Walter Griffith was designated for assignment and placed on irrevocable waivers. | Tuesday, August 2nd, 1955 | Signed Leo Lindop to a minor league contract with a signing bonus of $25,900. | Friday, July 29th, 1955 | Signed Augusto Romero to a minor league contract with a signing bonus of $9,100. | Thursday, July 21st, 1955 | Activated SP Brian O'Neal from the disabled list. | SP Steve Green was designated for assignment and placed on irrevocable waivers. | Monday, May 23rd, 1955 | Activated RF Domingo Valdés from the disabled list. | LF Walter Griffith was designated for assignment and placed on irrevocable waivers. | Wednesday, May 11th, 1955 | Activated LF Lawrence Starratt from the disabled list. | RF Toyotomi Akiyama was designated for assignment and placed on irrevocable waivers. | Sunday, April 3rd, 1955 | Activated MR Phil Gilmore from the disabled list. | Wednesday, March 30th, 1955 | Placed RF Domingo Valdés on the 15-day disabled list. | Saturday, November 6th, 1954 | Signed bench coach Enrique Mata to a 5-year, $17,900 per year contract. | Thursday, October 14th, 1954 | Signed General Manager David Rangel to a 3-year contract extension. | Signed Manager Steve Picot to a 3-year contract extension. | Bench Coach Emílio Martínez leaves the team, his contract was not renewed. | Signed Hitting Coach Tom Butler to a 1-year contract extension. | Signed Scouting Director Ismael Rodríguez to a 3-year contract extension. | Signed Team Trainer Héctor Olivares to a 1-year contract extension. | |
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