| Thursday, August 7th, 1958 | Boston Colonials: Signed Enrique Méndez to a minor league contract with a signing bonus of $3,700. | Boston Colonials: Signed Felipe Martínez to a minor league contract with a signing bonus of $42,000. | Los Angeles Moguls: Signed Matthew Watson to a minor league contract with a signing bonus of $103,900. | Los Angeles Moguls: Signed Ken Slocum to a minor league contract with a signing bonus of $31,100. | San Francisco Golden Gators: Signed Pedro López to a minor league contract with a signing bonus of $17,600. | San Francisco Golden Gators: Signed Lorenzo Torres to a minor league contract with a signing bonus of $5,400. | St. Louis Dredgers: Signed Román Medina to a minor league contract with a signing bonus of $22,200. | St. Louis Dredgers: Signed Carl Smiley to a minor league contract with a signing bonus of $8,600. | Detroit Bears: Signed Craig Jones to a minor league contract with a signing bonus of $7,100. | New York Empires: Signed Pedro Pérez to a minor league contract with a signing bonus of $62,500. | Cleveland Eagles: Signed Stan West to a minor league contract with a signing bonus of $17,900. | Baltimore Barons: Signed 1st round draft pick Anthony Cooke for a signing bonus of $125,100 and a 2-year major league contract worth a total of $250,200. | Baltimore Barons: Signed Troy Hartsell to a minor league contract with a signing bonus of $10,700. | Cincinnati Rivermen: Placed RF Jason Burns on waivers. | San Francisco Golden Gators: Placed 2B Jorge Alvarado on waivers. | Sunday, December 1st, 1957 | Chicago Hitmen: Recalled SS José Mercado from Triple A Uxbridge. | Chicago Hitmen: 1B Ben Schultz was designated for assignment and placed on waivers (from active). | Baltimore Barons: Lost CL Ben Anthony in the rule 5 draft to the Los Angeles Moguls. | Los Angeles Moguls: Optioned MR Bill Caldwell to Triple A Brantford. | Los Angeles Moguls: Drafted MR Ben Anthony in the 1957 rule 5 draft (Pick 3, Round 1, 3rd overall Pick), from the Baltimore Barons. | Cleveland Eagles: Lost 2B Patrick Fitzgerald in the rule 5 draft to the Chicago Hitmen. | Chicago Hitmen: Optioned 3B José Mercado to Triple A Uxbridge. | Chicago Hitmen: Drafted 3B Patrick Fitzgerald in the 1957 rule 5 draft (Pick 10, Round 1, 10th overall Pick), from the Cleveland Eagles. | Cincinnati Rivermen: Lost 1B José Fernández in the rule 5 draft to the San Francisco Golden Gators. | San Francisco Golden Gators: Optioned SS Juan Pérez to Triple A Ajax. | San Francisco Golden Gators: Drafted 1B José Fernández in the 1957 rule 5 draft (Pick 14, Round 1, 14th overall Pick), from the Cincinnati Rivermen. | Saturday, October 19th, 1957 | Atlanta Rebels: Assigned MR Glenn Knowles to Triple A Keswick. | Atlanta Rebels: Assigned C Nelson Romero to Triple A Keswick. | Boston Colonials: Assigned 1B Stephen Kennedy to Triple A Peterborough. | Boston Colonials: Assigned 1B Iván Castro to Triple A Peterborough. | Chicago Hitmen: Assigned C Joe Keys to Triple A Uxbridge. | Los Angeles Moguls: Assigned MR Miguel Chávez to Triple A Brantford. | Pittsburgh Keystones: Assigned LF Barry Hopkins to Triple A St. Catherines. | San Francisco Golden Gators: Assigned MR César Ybarra to Triple A Ajax. | San Francisco Golden Gators: Assigned C Ron Holt to Triple A Ajax. | San Francisco Golden Gators: Assigned 3B Roberto Mercado to Triple A Ajax. | St. Louis Dredgers: Assigned MR Lorenzo Zúñiga to Triple A Hamilton. | St. Louis Dredgers: Assigned RF Brett White to Triple A Hamilton. | New York Empires: Purchased the contract of C Miguel Ortíz from Triple A Guelph. | New York Empires: Optioned C Álex Cruz to Triple A Guelph. | New York Empires: Assigned LF Bryan Ferguson to Triple A Guelph. | Baltimore Barons: Purchased the contract of C Ramón Najcrea from Triple A Thornhill. | Baltimore Barons: C Carlos Delgado was designated for assignment and placed on waivers (from active). | Baltimore Barons: Assigned MR Jason Moore to Triple A Thornhill. | Baltimore Barons: Assigned RF Ray Murray to Triple A Thornhill. | Baltimore Barons: Assigned 1B Germán Rodríguez to Triple A Thornhill. | Boston Morrills: Assigned SP Felipe Silva to Triple A Oshawa. | Washington Mutuals: Assigned 3B Robert Younger to Triple A Welland. | Washington Mutuals: Assigned 2B Jorge Cruz to Triple A Welland. | Los Angeles Quakes: Assigned MR Chris Jackson to Triple A Port Credit. | Los Angeles Quakes: Assigned MR Brandon Johnson to Triple A Port Credit. | Los Angeles Quakes: Assigned MR David Hill to Triple A Port Credit. | Los Angeles Quakes: Assigned MR Ramón Márquez to Triple A Port Credit. | Washington Mutuals: Signed general manager Jesús García to a 5-year, $29,000 per year contract. | Pittsburgh Keystones: Signed bench coach Ed Breen to a 4-year, $29,200 per year contract. | Baltimore Barons: Signed general manager Jim Hayes to a 5-year, $29,400 per year contract. | Atlanta Rebels: Signed team doctor Glenn Jones to a 4-year, $14,200 per year contract. | Tuesday, October 15th, 1957 | Boston Morrills: 2B Joe Walker retires. | Detroit Bears: SP Gustavo Pacheco retires. | Atlanta Rebels: C Nelson Romero was designated for assignment and placed on irrevocable waivers. | Atlanta Rebels: MR Glenn Knowles was designated for assignment and placed on irrevocable waivers. | Atlanta Rebels: Optioned MR Alfonso Rodríguez to Triple A Keswick. | Atlanta Rebels: Optioned MR Rafael Muñóz to Triple A Keswick. | Atlanta Rebels: Optioned MR Pete Lucas to Triple A Keswick. | Atlanta Rebels: Optioned MR Pedro Rosas to Triple A Keswick. | Atlanta Rebels: Optioned C Millard Salinas to Triple A Keswick. | Atlanta Rebels: Optioned SS Paul Richards to Triple A Keswick. | Atlanta Rebels: Optioned RF Paul Hicks to Triple A Keswick. | Atlanta Rebels: Optioned 3B Emílio Valdés to Triple A Keswick. | Atlanta Rebels: Optioned CF Carlos Gómez to Triple A Keswick. | Boston Colonials: 1B Iván Castro was designated for assignment and placed on irrevocable waivers. | Boston Colonials: 1B Stephen Kennedy was designated for assignment and placed on waivers (from active). | Boston Colonials: Optioned MR Adam Magee to Triple A Peterborough. | Boston Colonials: Optioned MR Min-tae Pak to Triple A Peterborough. | Boston Colonials: Optioned C Fred Mitchell to Triple A Peterborough. | Boston Colonials: Optioned C Sam Duffy to Triple A Peterborough. | Boston Colonials: Optioned 2B José Medina to Triple A Peterborough. | Boston Colonials: Optioned SS Lawrence Davis to Triple A Peterborough. | Boston Colonials: Optioned SS Elijah Fisher to Triple A Peterborough. | Boston Colonials: Optioned RF Ronald Reilly to Triple A Peterborough. | Boston Colonials: Optioned RF Norm Sanders to Triple A Peterborough. | Boston Colonials: Optioned LF Félix Reyes to Triple A Peterborough. | Boston Colonials: Optioned RF Félix Cisneros to Triple A Peterborough. | Boston Colonials: Optioned 1B Armando King to Triple A Peterborough. | Boston Colonials: Optioned C Woody Palmer to Triple A Peterborough. | Chicago Hitmen: C Joe Keys was designated for assignment and placed on irrevocable waivers. | Chicago Hitmen: Optioned SP Jimmy Belmore to Triple A Uxbridge. | Chicago Hitmen: Optioned MR Dusty Akers to Triple A Uxbridge. | Chicago Hitmen: Optioned C Lou Spears to Triple A Uxbridge. | Chicago Hitmen: Optioned 1B Bartolo López to Triple A Uxbridge. | Chicago Hitmen: Optioned 3B Jimmy Mayfield to Triple A Uxbridge. | Chicago Hitmen: Optioned 3B José Mercado to Triple A Uxbridge. | Chicago Hitmen: Optioned 1B Steve Rogers to Triple A Uxbridge. | Chicago Hitmen: Optioned RF Raúl López to Triple A Uxbridge. | Chicago Hitmen: Optioned 2B Robert Lawrence to Triple A Uxbridge. | Cincinnati Rivermen: Assigned SS Clyde Hayes to Triple A Kitchener. | Los Angeles Moguls: MR Miguel Chávez was designated for assignment and placed on irrevocable waivers. | Los Angeles Moguls: Optioned MR José Costello to Triple A Brantford. | Los Angeles Moguls: Optioned SP José García to Triple A Brantford. | Los Angeles Moguls: Optioned MR Juan Lugo to Triple A Brantford. | Los Angeles Moguls: Optioned MR Morton Nix to Triple A Brantford. | Los Angeles Moguls: Optioned MR Byron Stubber to Triple A Brantford. | Los Angeles Moguls: Optioned C Harry Cole to Triple A Brantford. | Los Angeles Moguls: Optioned C Daniel Smith to Triple A Brantford. | Los Angeles Moguls: Optioned 1B Jing-bo Yang to Triple A Brantford. | Los Angeles Moguls: Optioned 2B Lorenzo Mendoza to Triple A Brantford. | Los Angeles Moguls: Optioned LF Javier Vázquez to Triple A Brantford. | Los Angeles Moguls: Optioned C Dennis Peterson to Triple A Brantford. | Pittsburgh Keystones: LF Barry Hopkins was designated for assignment and placed on waivers (from active). | Pittsburgh Keystones: Optioned C Ron Burns to Triple A St. Catherines. | Pittsburgh Keystones: Optioned C Paco De La Torre to Triple A St. Catherines. | Pittsburgh Keystones: Optioned 1B Kevin Wilson to Triple A St. Catherines. | Pittsburgh Keystones: Optioned SS Dave Carter to Triple A St. Catherines. | Pittsburgh Keystones: Optioned 2B Marvin Willard to Triple A St. Catherines. | Pittsburgh Keystones: Optioned SS Germán Blanco to Triple A St. Catherines. | Pittsburgh Keystones: Optioned LF Kurt Harrington to Triple A St. Catherines. | Pittsburgh Keystones: Optioned LF Hong-bin Siu to Triple A St. Catherines. | Pittsburgh Keystones: Optioned CF Tomás Espinosa to Triple A St. Catherines. | Pittsburgh Keystones: Optioned LF Millard Kaufman to Triple A St. Catherines. | Pittsburgh Keystones: Optioned RF Ray McElroy to Triple A St. Catherines. | Pittsburgh Keystones: Optioned RF Gilberto González to Triple A St. Catherines. | Pittsburgh Keystones: Optioned RF António Díaz to Triple A St. Catherines. | Pittsburgh Keystones: Optioned C Jeff O'Neal to Triple A St. Catherines. | San Francisco Golden Gators: 3B Roberto Mercado was designated for assignment and placed on irrevocable waivers. | San Francisco Golden Gators: C Ron Holt was designated for assignment and placed on irrevocable waivers. | San Francisco Golden Gators: MR César Ybarra was designated for assignment and placed on waivers (from active). | San Francisco Golden Gators: Optioned MR Don Hubbard to Triple A Ajax. | San Francisco Golden Gators: Optioned MR Pancho Herrera to Triple A Ajax. | San Francisco Golden Gators: Optioned 3B Cal Nelson to Triple A Ajax. | San Francisco Golden Gators: Optioned SS Jeremiah Held to Triple A Ajax. | San Francisco Golden Gators: Optioned RF Carlos Alfmana to Triple A Ajax. | San Francisco Golden Gators: Optioned CF Jeff Parrish to Triple A Ajax. | St. Louis Dredgers: RF Brett White was designated for assignment and placed on waivers (from active). | St. Louis Dredgers: MR Lorenzo Zúñiga was designated for assignment and placed on irrevocable waivers. | St. Louis Dredgers: Optioned MR Aubrey Decker to Triple A Hamilton. | St. Louis Dredgers: Optioned MR Peyton MacDonald to Triple A Hamilton. | St. Louis Dredgers: Optioned C Tom Dimaggio to Triple A Hamilton. | St. Louis Dredgers: Optioned 1B Chang-lit Ng to Triple A Hamilton. | St. Louis Dredgers: Optioned SS Woody Dickerson to Triple A Hamilton. | St. Louis Dredgers: Optioned 3B Danny Bullock to Triple A Hamilton. | St. Louis Dredgers: Optioned SS Nick Blackburn to Triple A Hamilton. | St. Louis Dredgers: Optioned RF Ernesto Reyes to Triple A Hamilton. | St. Louis Dredgers: Optioned 2B Iván Pérez to Triple A Hamilton. | St. Louis Dredgers: Optioned 2B Fred Johnson to Triple A Hamilton. | St. Louis Dredgers: Optioned 3B Dan Johnston to Triple A Hamilton. | Chicago Clout: Optioned MR Marcos Costa to Triple A Brampton. | Chicago Clout: Optioned 1B José Villarreal to Triple A Brampton. | Chicago Clout: Optioned 2B Barry Baldwin to Triple A Brampton. | Chicago Clout: Optioned SS Jesús Pérez to Triple A Brampton. | Chicago Clout: Optioned CF Tad Rush to Triple A Brampton. | Chicago Clout: Optioned LF Greg Moore to Triple A Brampton. | Chicago Clout: Optioned 1B Desmond Bower to Triple A Brampton. | Detroit Bears: Optioned MR Juan Gutiérrez to Triple A Vaughan. | Detroit Bears: Optioned MR Donald Wagner to Triple A Vaughan. | Detroit Bears: Optioned MR Richie Varkevisser to Triple A Vaughan. | Detroit Bears: Optioned MR José Martínez to Triple A Vaughan. | Detroit Bears: Optioned MR Tony Zumaya to Triple A Vaughan. | Detroit Bears: Optioned SS Ed Stanley to Triple A Vaughan. | Detroit Bears: Optioned 3B George Reeves to Triple A Vaughan. | Detroit Bears: Optioned SS Timoteo Tegliacci to Triple A Vaughan. | Detroit Bears: Optioned SS William Smith to Triple A Vaughan. | Detroit Bears: Optioned LF Brian Bernard to Triple A Vaughan. | Detroit Bears: Optioned LF José Negrón to Triple A Vaughan. | Detroit Bears: Optioned RF Jared Walls to Triple A Vaughan. | Detroit Bears: Optioned RF Jim Pearson to Triple A Vaughan. | Detroit Bears: Optioned 3B Jim O'Halloran to Triple A Vaughan. | New York Empires: LF Bryan Ferguson was designated for assignment and placed on waivers (from active). | New York Empires: Optioned SP Tadamasa Okada to Triple A Guelph. | New York Empires: Optioned MR Hugo Hunter to Triple A Guelph. | New York Empires: Optioned MR Bob Robinson to Triple A Guelph. | New York Empires: Optioned MR Dave Tittmuss to Triple A Guelph. | New York Empires: Optioned MR Carlos Cruz to Triple A Guelph. | New York Empires: Optioned MR Andrew Grigg to Triple A Guelph. | New York Empires: Optioned SS Jorge Gonzáles to Triple A Guelph. | New York Empires: Optioned 2B Elroy Morris to Triple A Guelph. | New York Empires: Optioned 3B Jesús Palma to Triple A Guelph. | New York Empires: Optioned LF Jesús Zúñiga to Triple A Guelph. | New York Empires: Optioned RF Guillermo Ramos to Triple A Guelph. | Cleveland Eagles: Assigned RF Hugh O'Hagarty to Triple A Pickering. | Baltimore Barons: MR Jason Moore was designated for assignment and placed on irrevocable waivers. | Baltimore Barons: 1B Germán Rodríguez was designated for assignment and placed on irrevocable waivers. | Baltimore Barons: RF Ray Murray was designated for assignment and placed on irrevocable waivers. | Baltimore Barons: Optioned SP Tomás Garza to Triple A Thornhill. | Baltimore Barons: Optioned MR Lou Little to Triple A Thornhill. | Baltimore Barons: Optioned MR Lorenzo Bonilla to Triple A Thornhill. | Baltimore Barons: Optioned C Neal Lancaster to Triple A Thornhill. | Baltimore Barons: Optioned SS Bill Rigge to Triple A Thornhill. | Baltimore Barons: Optioned SS Matthieu Murray to Triple A Thornhill. | Baltimore Barons: Optioned 1B Calvin Allen to Triple A Thornhill. | Baltimore Barons: Optioned RF Mike Hudson to Triple A Thornhill. | Baltimore Barons: Optioned 2B Teuk-chin Ch'oe to Triple A Thornhill. | Boston Morrills: Purchased the contract of SS Arturo Carbajal from Triple A Oshawa. | Boston Morrills: SP Felipe Silva was designated for assignment and placed on irrevocable waivers. | Boston Morrills: Optioned MR Max Woodard to Triple A Oshawa. | Boston Morrills: Optioned MR Anastasio Gallegos to Triple A Oshawa. | Boston Morrills: Optioned MR Lee Jensen to Triple A Oshawa. | Boston Morrills: Optioned MR Greg Fox to Triple A Oshawa. | Boston Morrills: Optioned C Travis Brown to Triple A Oshawa. | Boston Morrills: Optioned C Darrell Roach to Triple A Oshawa. | Boston Morrills: Optioned 1B Jerry Garfield to Triple A Oshawa. | Boston Morrills: Optioned SS Bob Thompson to Triple A Oshawa. | Boston Morrills: Optioned 3B Ken Anderson to Triple A Oshawa. | Boston Morrills: Optioned CF Víctor Martínez to Triple A Oshawa. | Boston Morrills: Optioned LF Jud Hopkins to Triple A Oshawa. | Boston Morrills: Optioned RF Ricardo Serrano to Triple A Oshawa. | Washington Mutuals: 2B Jorge Cruz was designated for assignment and placed on waivers (from active). | Washington Mutuals: 3B Robert Younger was designated for assignment and placed on waivers (from active). | Washington Mutuals: Optioned MR Daron Miller to Triple A Welland. | Washington Mutuals: Optioned 1B Scott Fields to Triple A Welland. | Washington Mutuals: Optioned 3B Xu Sen to Triple A Welland. | Washington Mutuals: Optioned RF Ed Couch to Triple A Welland. | Washington Mutuals: Optioned RF Aurelio Valdés to Triple A Welland. | Washington Mutuals: Optioned RF Jesse Raines to Triple A Welland. | Washington Mutuals: Optioned 1B Cliff MacFadden to Triple A Welland. | Los Angeles Quakes: MR Chris Jackson was designated for assignment and placed on irrevocable waivers. | Los Angeles Quakes: MR Brandon Johnson was designated for assignment and placed on waivers (from active). | Los Angeles Quakes: MR David Hill was designated for assignment and placed on waivers (from active). | Los Angeles Quakes: MR Ramón Márquez was designated for assignment and placed on irrevocable waivers. | Los Angeles Quakes: Optioned MR Jerome Newell to Triple A Port Credit. | Los Angeles Quakes: Optioned MR Manny Canó to Triple A Port Credit. | Los Angeles Quakes: Optioned MR Jason Wallace to Triple A Port Credit. | Los Angeles Quakes: Optioned MR Jorge Rivera to Triple A Port Credit. | Los Angeles Quakes: Optioned C Demetrio Brunelleschi to Triple A Port Credit. | Los Angeles Quakes: Optioned 1B Will Daniels to Triple A Port Credit. | Los Angeles Quakes: Optioned RF Richard Jackson to Triple A Port Credit. | Los Angeles Quakes: Optioned RF Julián Jiménez to Triple A Port Credit. | Los Angeles Quakes: Optioned RF Clancy Thomas to Triple A Port Credit. | Los Angeles Quakes: Optioned LF Renaud Brisebois to Triple A Port Credit. | St. Louis Dredgers: MA Dave Thompson retires. | Detroit Bears: HC Jesús Galló retires. | Boston Morrills: SC Tyler Howard retires. | Atlanta Rebels: Signed Pitching Coach Nicholas Heath to a 1-year contract extension. | Atlanta Rebels: Team Trainer Christian Wills leaves the team, his contract was not renewed. | Boston Colonials: Signed General Manager Luis González to a 2-year contract extension. | Boston Colonials: Signed Pitching Coach Bob Blevins to a 2-year contract extension. | Boston Colonials: Signed Hitting Coach Luis Castro to a 1-year contract extension. | Boston Colonials: Signed Team Trainer Terry Conklin to a 3-year contract extension. | Chicago Hitmen: Manager Steve Picot leaves the team, his contract was not renewed. | Chicago Hitmen: Hitting Coach Tom Butler leaves the team, his contract was not renewed. | Chicago Hitmen: Scouting Director Ismael Rodríguez leaves the team, his contract was not renewed. | Cincinnati Rivermen: Signed Pitching Coach Cameron Knowles to a 2-year contract extension. | Cincinnati Rivermen: Signed Team Trainer Carl Watson to a 1-year contract extension. | Pittsburgh Keystones: Bench Coach Ronnie Richardson leaves the team, his contract was not renewed. | Pittsburgh Keystones: Signed Pitching Coach Greg Collins to a 3-year contract extension. | San Francisco Golden Gators: Bench Coach Howard Watkins leaves the team, his contract was not renewed. | St. Louis Dredgers: Signed Team Trainer Bill Miller to a 1-year contract extension. | Chicago Clout: Manager Fernando Rivera leaves the team, his contract was not renewed. | New York Empires: Signed Pitching Coach Roberto Echevarría to a 2-year contract extension. | Cleveland Eagles: Signed General Manager Roberto Méndez to a 1-year contract extension. | Cleveland Eagles: Signed Manager Anastasio Montero to a 2-year contract extension. | Cleveland Eagles: Signed Hitting Coach Jason Camp to a 3-year contract extension. | Cleveland Eagles: Signed Scouting Director Bailey Gray to a 1-year contract extension. | Cleveland Eagles: Signed Team Trainer Jesús Escobar to a 3-year contract extension. | Baltimore Barons: Fired general manager Jesús García. | Baltimore Barons: Signed Manager Joe Fish to a 1-year contract extension. | Baltimore Barons: Signed Pitching Coach José Garza to a 1-year contract extension. | Baltimore Barons: Signed Team Trainer Dave Elliott to a 1-year contract extension. | Washington Mutuals: Fired general manager Jim Hayes. | Washington Mutuals: Hitting Coach Cheslav Mamatulin leaves the team, his contract was not renewed. | Washington Mutuals: Team Trainer Glenn Jones leaves the team, his contract was not renewed. | Los Angeles Quakes: Fired manager Markus Houston. | Cincinnati Rivermen: Activated CF Cisco García from the 60-day disabled list. | Cincinnati Rivermen: Optioned RF Hidekazu Gato to Triple A Kitchener. | Washington Mutuals: Activated SP Jessie Byer from the disabled list. | Washington Mutuals: Optioned SP Dae-ho Yi to Triple A Welland. | |
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