Boston Red Sox:
Restricted: Bill Butland (UC), Joe Cronin, Dom Dimaggio, Joe Dobson*, Bobby Doerr, Lou Finney*, Pete Fox, Tex Hughson, Dick Newsome, Mike Ryba, Charlie Wagner, Ted Williams
Unrestricted: Jim Bagby, Lou Boudreau, Mickey Harris, Ken Heintzelman, Barney McCosky, Jake Mooty, Joe Orengo, Johnny Peacock, Jim Tabor

New: Emerson Dickman, Al Flair, Lefty Grove, Frankie Pytlak,

Lost: Mace Brown (FA), Bill Conroy (UC/FA), Jimmy Grant (DN), Al Hollingsworth (UC/FA), Johnny Pesky (DN), Yank Terry (DN), Jimmy Wasdell (FA)

 Boston Braves:
Restricted: Tom Earley, Dick Errickson, Buddy Gremp, Al Javery, Chet Ross, Manny Salvo, Jim Tobin
Unrestricted: Johnny Cooney, Gene Desautels, George Dickey, Vince Dimaggio, Bob Elliott, Nick Etten, Oscar Grimes, Don Heffner, Phil Masi, Dutch Meyer, Eddie Miller, Skeeter Webb, Whitey Wietelmann, Early Wynn

New:  Art Johnson, Frank LaManna, Don Manno, Al Montgomery

Lost: Ducky Detweiler (DN), Bill Donovan (DN), Nanny Fernandez (DN), Tommy Holmes* (DN), Johnny Lindell (DN), Johnny Sain (DN), Lou Tost (DN), Harry Walker (UC/FA), Lefty Wallace (DN)

 Brooklyn Dodgers:
Restricted: Dolph Camilli*, Hugh Casey*, Curt Davis, Freddie Fitzsimmons, Ed Head (UC), Cookie Lavagetto, Pee Wee Reese, Lou Riggs, Arky Vaughan, Dixie Walker*
Unrestricted: Bill Baker (UC), Frank Demaree, Frankie Hayes, Billy Herman, Earl Johnson, Bob Klinger, Joe Medwick, Al Milnar, Fritz Ostermueller, Johnny Podgajny, Pete Reiser, Paul Waner, Whitlow Wyatt

New: Tom Drake, Leo Durocher, Vito Tamulis, Kemp Wicker

Lost: Frenchy Bordagaray (FA), Larry French (FA), Augie Galan (FA), Luke Hamlin (FA), Gus Mancuso (FA), Johnny Rizzo (FA), Arky Vaughan (FA)

 Chicago White Sox:
Restricted: Luke Appling, Joe Haynes*, Thornton Lee*, Dario Lodigiani, Ted Lyons, Johnny Rigney, Buck Ross, Eddie Smith, Moose Solters, Tom Turner, Taffy Wright*
Unrestricted: Tony Criscola, Elbie Fletcher, Johnny Humphries, Al Lopez, Rube Melton, Bill Mueller, Pinky May, Rip Radcliff, Al Smith, Mike Tresh, Max West

New: 

Lost: Ellis Clary (DN), Orval Grove (DN), Buster Mills (UC/FA), Don Ross (UC/FA), Sammy West (FA)

 Chicago Cubs:
Restricted: Phil Cavarretta*, Dom Dallessandro, Bill Fleming, Stan Hack, Lou Novikoff, Vern Olsen, Claude Passeau, Tot Pressnell, Al Todd (UC), Mickey Witek
Unrestricted: Tiny Bonham, Jimmy Brown, Babe Dahlgren, Al Evans, Charlie Gilbert, Marty Marion, Dee Miles, Mike Naymick (UC), Bill Nicholson, Birdie Tebbetts, Gene (Junior) Thompson

New: Vallie Eaves, Johnny Hudson, Billy Myers, Barney Olsen, Vance Page, Charlie Root

Lost: Hi Bithorn (DN), Cy Block (DN), Murry Dickson (DN), Tom Ferrick (FA), Bill Fleming (FA), Bert Haas (DN), Chico Hernandez (DN), Lennie Merullo (DN), Earl Naylor (DN), Johnny Schmitz (DN), Lon Warneke (FA), Hank Wyse (DN)

 Cincinnati Reds:
Restricted: Chuck Aleno, Joe Beggs*, Paul Derringer*, Ival Goodman*, Elmer Riddle*, Eric Tipton, Johnny Vander Meer*, Bucky Walters, Billy Werber*
Unrestricted: Harry Craft, Lonny Frey, Mel Harder, Eddie Joost, Dave Koslo, Ernie Koy, Mickey Livingston, Frank McCormick, Mike McCormick, Hugh Mulcahy (MS), Ray Starr, Dick West

New: Jim Gleeson, Bobby Mattick, Whitey Moore, Monte Pearson

Lost: Joe Abreu (DN), Pete Appleton (FA), Billy Hitchcock (DN), Frankie Kelleher (DN), Ray Lamanno (DN), Max Marshall (DN), Gee Walker (FA),

 Detroit Tigers:
Restricted: Tommy Bridges, Charlie Gehringer, Johnny Gorsica, Hank Greenberg*, Ned Harris, Roy Henshaw
Unrestricted: Don Kolloway, Chet Laabs, Eric McNair, Johnny Murphy, Hal Newhouser, Bobo Newsom, Rusty Peters, Schoolboy Rowe, Billy Sullivan, Dizzy Trout, Mickey Vernon, Hal Wagner, Roy Weatherly

New: Floyd Giebell, Archie McKain, Boyd Perry, Bud Thomas

Lost: Johnny Barrett (DN), Buddy Blair (DN), Chubby Dean (FA), Les Fleming (DN), Moe Franklin (DN), Hal Manders (DN), Pat Mullin (DN), Dixie Parsons (DN), Virgil Trucks (DN), Jack Wallaesa (DN)

 New York Yankees:
Restricted: Marv Breuer, Spud Chandler, Frankie Crosetti, Bill Dickey, Joe Dimaggio, Atley Donald, Lefty Gomez, Tommy Henrich, Charlie Keller*, Phil Rizzuto, Red Rolfe, Red Ruffing*, Marius Russo, George Selkirk
Unrestricted: Bill Dietrich, Ray Mack, Danny Murtaugh, Skeeter Newsome, Buddy Rosar, Bud Stewart

New: Norm Branch, Steve Peek, Charley Stanceu, Johnny Sturm

Lost: Hank Borowy (DN), Ken Chase (FA), Jimmy Foxx (FA), Buddy Hassett (FA), Johnny Lipon (DN), Ron Northey (DN), Jake Wade (UC/FA)

 New York Giants:
Restricted: Ace Adams, Babe Barna, Dick Bartell, Bob Carpenter, Harry Danning, Harry Feldman, Carl Hubbell, Billy Jurges*, Bill Lohrman, Buster Maynard, Bill McGee, Cliff Melton, Johnny Mize*, Van Lingle Mungo, Mel Ott, Johnny Rucker, Hal Schumacher, Les Webber*
Unrestricted: Harry Gumbert, Bob Kennedy, Danny Murtaugh, Bama Rowell, Rudy York, Babe Young

New: Morrie Arnovich, Bob Bowman, Jumbo Brown, John Davis, Odell Hale, Gabby Hartnett, Jo Jo Moore

Lost: Ray Berres (FA), Hank Leiber (FA), Max Macon (DN), Willard Marshall (DN), Bob Swift (FA)

 Philadelphia A's:
Restricted: Bill Beckmann, Al Brancato, Fred Caligiuri, Eddie Collins, Crash Davis, Dick Fowler, Lum Harris, Jack Knott, Phil Marchildon, Dick Siebert, Pete Suder
Unrestricted: Sam Chapman, Paul Erickson, Harry Eisenstat, Rick Ferrell, Jeff Heath, Ed Heusser (UC), Mike Higgins, Lefty Hoerst, Tommy Hughes, Bob Johnson, Clyde Kluttz, Bill Lee, Ike Pearson, Rip Russell (UC), Elmer Valo, Bennie Warren, Roger Wolff

New: Johnny Babich, Fred Chapman, Bump Hadley, Benny McCoy, Les McCrabb, Porter Vaughan

Lost: Russ Christopher (DN), Doc Cramer* (FA), Bob Harris (FA), Bill Knickerbocker (FA), Earl Naylor
 
 Pittsburgh Pirates:
Restricted: Alf Anderson, Max Butcher, Spud Davis, Frankie Gustine*, Johnny Lanning, Rip Sewell, Maurice Van Robays, Lefty Wilkie
Unrestricted: Bobby Bragan, George Caster, Sid Gordon, Kirby Higbe, Joe Kuhel, Dan Litwhiler, Clyde McCullough, Bob Muncrief, Skippy Roberge

New: Ripper Collins, Vinnie Smith, Joe Sullivan

Lost: Pete Coscarart (FA), Otto Denning (DN), Al Glossop (UC/FA), Hank Gornicki (DN), Jack Hallett (FA), Vern Kennedy (FA), Ed Levy (DN), Tony Lupien (DN), Wally Moses (FA), Babe Phelps (FA), 

 St. Louis Browns:
Restricted: Elden Auker, Mike Chartak, Mark Christman* (UC), Harlond Clift*, Joe Grace*, Johnny Lucadello, Glen McQuillen, Alan Strange
Unrestricted: Johnny Allen, Johnny Berardino, Jimmy Bloodworth, Roy Cullenbine, Bob Feller, Denny Galehouse, Steve Gromek, Don Gutteridge, Johnny Hutchings, Wally Judnich, Jack Kramer, Newt Kimball, Johnny Niggeling, Mickey Owen, Vern Stephens, Nick Strincevich, Bill Zuber

New: George Archie, Frank Grube, Archie McKain, Maury Newlin

Lost: Red Embree (DN), Rollie Hemsley (FA), Mike Kreevich (FA), Hank Riebe (DN), Ray Scarborough (DN), Steve Sundra (FA), Lloyd Waner (FA)

 St. Louis Cardinals:
Restricted: Mort Cooper*, Creepy Crespi, Howie Krist, Whitey Kurowski, Pepper Martin (UC), Terry Moore, Stan Musial, Ray Sanders*
Unrestricted: Stan Benjamin, Walker Cooper, Johnny Hopp, Tommy Hughes, Si Johnson, Oscar Judd, Ken Keltner, Max Lanier, Gus Mancuso, Don Padgett, Howie Pollet, Jerry Priddy, Clyde Shoun, Enos Slaughter, Lou Stringer, Bobby Sturgeon, Coaker Triplett, Ernie White

New: Bill Crouch

Lost: Tony Cuccinello (UC/FA), Stan Ferens (DN), Ken O'Dea (FA), 

 Washington Senators:
Restricted: Alex Carrasquel, Buddy Lewis, Jimmy Pofahl, John Sullivan*, Cecil Travis
Unrestricted: Johnny Beazley, Al Benton, George Case, Jake Early, Joe Gordon, Lee Handley, Joe Heving, Oris Hockett, Sid Hudson, Vern Kennedy, Dutch Leonard, Walt Masterson, George McQuinn, Stan Spence, Hal White

New: Red Anderson, George Archie, Buddy Myer

Lost: Frank Biscan (DN), Cy Block (DN), Bruce Campbell (FA), Frank Croucher (FA), Bobby Estalella (FA), Chile Gomez (UC/FA), Ernie Lombardi (FA), Len Perme (DN), Bob Repass (DN), Bill Trotter (FA), Jack Wilson (DN)