| 1937-01-09 | Roy Mahaffey | | Traded from St. Louis Browns to Seattle (PCL) for Lou Koupal | MLB |
| 1937-01-09 | Lou Koupal | St. Louis Browns | Traded from Seattle (PCL) to St. Louis Browns for Roy Mahaffey | MLB |
| 1937-01-17 | Ivy Andrews | Cleveland Indians | Traded from St. Louis Browns with Lyn Lary and Moose Solters to Cleveland Indians for Bill Knickerbocker, Joe Vosmik and Oral Hildebrand | MLB |
| 1937-01-17 | Lyn Lary | Cleveland Indians | Traded from St. Louis Browns with Ivy Andrews and Moose Solters to Cleveland Indians for Bill Knickerbocker, Joe Vosmik and Oral Hildebrand | MLB |
| 1937-01-17 | Moose Solters | Cleveland Indians | Traded from St. Louis Browns with Ivy Andrews and Lyn Lary to Cleveland Indians for Bill Knickerbocker, Joe Vosmik and Oral Hildebrand | MLB |
| 1937-01-17 | Bill Knickerbocker | St. Louis Browns | Traded from Cleveland Indians with Joe Vosmik and Oral Hildebrand to St. Louis Browns for Ivy Andrews, Lyn Lary and Moose Solters | MLB |
| 1937-01-17 | Joe Vosmik | St. Louis Browns | Traded from Cleveland Indians with Bill Knickerbocker and Oral Hildebrand to St. Louis Browns for Ivy Andrews, Lyn Lary and Moose Solters | MLB |
| 1937-01-17 | Oral Hildebrand | St. Louis Browns | Traded from Cleveland Indians with Bill Knickerbocker and Joe Vosmik to St. Louis Browns for Ivy Andrews, Lyn Lary and Moose Solters | MLB |
| 1937-01-29 | Red Kress | | Traded from Washington Senators I with Carl Reynolds to Minneapolis (American Association) for Jimmy Wasdell | MLB |
| 1937-01-29 | Carl Reynolds | | Traded from Washington Senators I with Red Kress to Minneapolis (American Association) for Jimmy Wasdell | MLB |
| 1937-01-29 | Jimmy Wasdell | Washington Senators I | Traded from Minneapolis (American Association) to Washington Senators I for Carl Reynolds and Red Kress | MLB |
| 1937-03-30 | Ed Coleman | | Traded from St. Louis Browns to Toledo (American Association) for Harry Davis (9/10/1936) | MLB |
| 1937-04-09 | Lynn Nelson | Philadelphia Athletics | Traded from Memphis (Southern Association) to Philadelphia Athletics for Carl Doyle, Al Benton, Jack Peerson and Oliver Blakeney | MLB |
| 1937-04-09 | Carl Doyle | | Traded from Philadelphia Athletics with Al Benton, Jack Peerson and Oliver Blakeney to Memphis (Southern Association) for Lynn Nelson | MLB |
| 1937-04-09 | Al Benton | | Traded from Philadelphia Athletics with Carl Doyle, Jack Peerson and Oliver Blakeney to Memphis (Southern Association) for Lynn Nelson | MLB |
| 1937-04-09 | Jack Peerson | | Traded from Philadelphia Athletics with Carl Doyle, Al Benton and Oliver Blakeney to Memphis (Southern Association) for Lynn Nelson | MLB |
| 1937-04-16 | Earl Browne | Philadelphia Phillies | Traded from Pittsburgh Pirates to Philadelphia Phillies for Joe Bowman | MLB |
| 1937-04-16 | Joe Bowman | Pittsburgh Pirates | Traded from Philadelphia Phillies to Pittsburgh Pirates for Earl Browne | MLB |
| 1937-05-01 | Tommy Thevenow | Boston Bees | Traded from New York Giants to Boston Bees for Billy Urbanski | MLB |
| 1937-05-01 | Billy Urbanski | New York Giants | Traded from Boston Bees to New York Giants for Tommy Thevenow | MLB |
| 1937-05-02 | Johnny Riddle | Washington Senators I | Traded from Washington Senators I with Shanty Hogan to Indianapolis (American Association) for Shanty Hogan | MLB |
| 1937-05-02 | Shanty Hogan | | Traded from Washington Senators I with Johnny Riddle to Indianapolis (American Association) for Johnny Riddle | MLB |
| 1937-05-20 | Shanty Hogan | Washington Senators I | Traded from Washington Senators I with Johnny Riddle to Indianapolis (American Association) for Johnny Riddle | MLB |
| 1937-05-24 | Randy Moore | St. Louis Cardinals | Traded from Brooklyn Dodgers to St. Louis Cardinals for Paul Chervinko | MLB |
| 1937-05-24 | Paul Chervinko | Brooklyn Dodgers | Traded from St. Louis Cardinals to Brooklyn Dodgers for Randy Moore | MLB |
| 1937-06-11 | Freddie Fitzsimmons | Brooklyn Dodgers | Traded from New York Giants to Brooklyn Dodgers for Tom Baker | MLB |
| 1937-06-11 | Tom Baker | New York Giants | Traded from Brooklyn Dodgers to New York Giants for Freddie Fitzsimmons | MLB |
| 1937-06-11 | Ben Chapman | Boston Red Sox | Traded from Washington Senators I with Bobo Newsom to Boston Red Sox for Rick Ferrell, Wes Ferrell and Mel Almada | MLB |
| 1937-06-11 | Bobo Newsom | Boston Red Sox | Traded from Washington Senators I with Ben Chapman to Boston Red Sox for Rick Ferrell, Wes Ferrell and Mel Almada | MLB |
| 1937-06-11 | Rick Ferrell | Washington Senators I | Traded from Boston Red Sox with Wes Ferrell and Mel Almada to Washington Senators I for Ben Chapman and Bobo Newsom | MLB |
| 1937-06-11 | Wes Ferrell | Washington Senators I | Traded from Boston Red Sox with Rick Ferrell and Mel Almada to Washington Senators I for Ben Chapman and Bobo Newsom | MLB |
| 1937-06-11 | Mel Almada | Washington Senators I | Traded from Boston Red Sox with Rick Ferrell and Wes Ferrell to Washington Senators I for Ben Chapman and Bobo Newsom | MLB |
| 1937-06-15 | Frank Gabler | Boston Bees | Traded from New York Giants to Boston Bees for Wally Berger | MLB |
| 1937-06-15 | Wally Berger | New York Giants | Traded from Boston Bees to New York Giants for Frank Gabler | MLB |
| 1937-07-11 | Lindsay Brown | Brooklyn Dodgers | Traded from Detroit Tigers to Brooklyn Dodgers for Ralph Birkofer | MLB |
| 1937-07-11 | Ralph Birkofer | Detroit Tigers | Traded from Brooklyn Dodgers to Detroit Tigers for Lindsay Brown | MLB |
| 1937-07-23 | Frank Skaff | Washington Senators I | Traded from Brooklyn Dodgers to Washington Senators I for Jake Daniel | MLB |
| 1937-07-23 | Jake Daniel | Brooklyn Dodgers | Traded from Washington Senators I to Brooklyn Dodgers for Frank Skaff | MLB |
| 1937-07-26 | Blondy Ryan | New York Giants | Traded from Cleveland Indians to New York Giants for Doc Marshall | MLB |
| 1937-07-26 | Doc Marshall | Cleveland Indians | Traded from New York Giants to Cleveland Indians for Blondy Ryan | MLB |
| 1937-09-04 | Paul Kardow | | Traded from Cleveland Indians with Blas Monaco to Buffalo (International) for Mike McCormick | MLB |
| 1937-09-04 | Mike McCormick | Cleveland Indians | Traded from Buffalo (International) to Cleveland Indians for Paul Kardow and Blas Monaco (9/14/1937) | MLB |
| 1937-09-10 | Ben Geraghty | Washington Senators I | Traded from Brooklyn Dodgers with Jack Radtke to Washington Senators I for Fred Chapman | MLB |
| 1937-09-10 | Jack Radtke | Washington Senators I | Traded from Brooklyn Dodgers with Ben Geraghty to Washington Senators I for Fred Chapman | MLB |
| 1937-09-10 | Fred Chapman | Brooklyn Dodgers | Traded from Washington Senators I to Brooklyn Dodgers for Ben Geraghty and Jack Radtke | MLB |
| 1937-09-14 | Blas Monaco | | Traded from Cleveland Indians with Paul Kardow to Buffalo (International) for Mike McCormick (9/4/1937) | MLB |
| 1937-10-04 | Leo Durocher | Brooklyn Dodgers | Traded from St. Louis Cardinals to Brooklyn Dodgers for Johnny Cooney, Jim Bucher, Joe Stripp and Roy Henshaw | MLB |
| 1937-10-04 | Johnny Cooney | St. Louis Cardinals | Traded from Brooklyn Dodgers with Jim Bucher, Joe Stripp and Roy Henshaw to St. Louis Cardinals for Leo Durocher | MLB |
| 1937-10-04 | Jim Bucher | St. Louis Cardinals | Traded from Brooklyn Dodgers with Johnny Cooney, Joe Stripp and Roy Henshaw to St. Louis Cardinals for Leo Durocher | MLB |
| 1937-10-04 | Joe Stripp | St. Louis Cardinals | Traded from Brooklyn Dodgers with Johnny Cooney, Jim Bucher and Roy Henshaw to St. Louis Cardinals for Leo Durocher | MLB |
| 1937-10-04 | Roy Henshaw | St. Louis Cardinals | Traded from Brooklyn Dodgers with Johnny Cooney, Jim Bucher and Joe Stripp to St. Louis Cardinals for Leo Durocher | MLB |
| 1937-10-13 | Tom Padden | St. Louis Cardinals | Traded from Pittsburgh Pirates with Bernard Cobb and Bud Hafey to St. Louis Cardinals for Johnny Rizzo | MLB |
| 1937-10-13 | Johnny Rizzo | Pittsburgh Pirates | Traded from St. Louis Cardinals to Pittsburgh Pirates for Tom Padden, Bernard Cobb and Bud Hafey (12/15/1937) | MLB |
| 1937-10-19 | Dario Lodigiani | Philadelphia Athletics | Traded from Oakland (PCL) to Philadelphia Athletics for Jesse Hill (11/5/1937), Bill Conroy (11/5/1937) and Hal Luby (11/5/1937) | MLB |
| 1937-11-05 | Jesse Hill | | Traded from Philadelphia Athletics with Bill Conroy and Hal Luby to Oakland (PCL) for Dario Lodigiani (10/19/1937) | MLB |
| 1937-11-05 | Bill Conroy | | Traded from Philadelphia Athletics with Jesse Hill and Hal Luby to Oakland (PCL) for Dario Lodigiani (10/19/1937) | MLB |
| 1937-11-05 | Hal Luby | | Traded from Philadelphia Athletics with Jesse Hill and Bill Conroy to Oakland (PCL) for Dario Lodigiani (10/19/1937) | MLB |
| 1937-12-01 | Chief Hogsett | Washington Senators I | Traded from St. Louis Browns to Washington Senators I for Ed Linke | MLB |
| 1937-12-01 | Bob Swift | St. Louis Browns | Traded from New York Yankees to St. Louis Browns for Stan Keyes | MLB |
| 1937-12-01 | Ed Linke | St. Louis Browns | Traded from Washington Senators I to St. Louis Browns for Chief Hogsett | MLB |
| 1937-12-02 | Dixie Walker | Detroit Tigers | Traded from Chicago White Sox with Vern Kennedy and Tony Piet to Detroit Tigers for Marv Owen, Mike Tresh and Gee Walker | MLB |
| 1937-12-02 | Joe Vosmik | Boston Red Sox | Traded from St. Louis Browns to Boston Red Sox for Bobo Newsom, Red Kress and Buster Mills | MLB |
| 1937-12-02 | Bobo Newsom | St. Louis Browns | Traded from Boston Red Sox with Red Kress and Buster Mills to St. Louis Browns for Joe Vosmik | MLB |
| 1937-12-02 | Red Kress | St. Louis Browns | Traded from Boston Red Sox with Bobo Newsom and Buster Mills to St. Louis Browns for Joe Vosmik | MLB |
| 1937-12-02 | Buster Mills | St. Louis Browns | Traded from Boston Red Sox with Bobo Newsom and Red Kress to St. Louis Browns for Joe Vosmik | MLB |
| 1937-12-02 | Marv Owen | Chicago White Sox | Traded from Detroit Tigers with Mike Tresh and Gee Walker to Chicago White Sox for Vern Kennedy, Tony Piet and Dixie Walker | MLB |
| 1937-12-02 | Mike Tresh | Chicago White Sox | Traded from Detroit Tigers with Marv Owen and Gee Walker to Chicago White Sox for Vern Kennedy, Tony Piet and Dixie Walker | MLB |
| 1937-12-02 | Gee Walker | Chicago White Sox | Traded from Detroit Tigers with Marv Owen and Mike Tresh to Chicago White Sox for Vern Kennedy, Tony Piet and Dixie Walker | MLB |
| 1937-12-02 | Vern Kennedy | Detroit Tigers | Traded from Chicago White Sox with Tony Piet and Dixie Walker to Detroit Tigers for Marv Owen, Mike Tresh and Gee Walker | MLB |
| 1937-12-02 | Tony Piet | Detroit Tigers | Traded from Chicago White Sox with Vern Kennedy and Dixie Walker to Detroit Tigers for Marv Owen, Mike Tresh and Gee Walker | MLB |
| 1937-12-03 | Eddie Miller | New York Yankees | Traded from Cincinnati Reds to New York Yankees for Willard Hershberger | MLB |
| 1937-12-03 | Willard Hershberger | Cincinnati Reds | Traded from New York Yankees to Cincinnati Reds for Eddie Miller | MLB |
| 1937-12-04 | Vito Tamulis | St. Louis Browns | Traded from New York Yankees to St. Louis Browns for Harry Davis | MLB |
| 1937-12-04 | Harry Davis | New York Yankees | Traded from St. Louis Browns to New York Yankees for Vito Tamulis | MLB |
| 1937-12-07 | Ted Williams | Boston Red Sox | Traded from San Diego (PCL) to Boston Red Sox for Dom Dallessandro, Al Niemiec and Spencer Harris (12/9/1937) | MLB |
| 1937-12-07 | Dom Dallessandro | | Traded from Boston Red Sox with Al Niemiec and Spencer Harris to San Diego (PCL) for Ted Williams | MLB |
| 1937-12-07 | Al Niemiec | | Traded from Boston Red Sox with Dom Dallessandro and Spencer Harris to San Diego (PCL) for Ted Williams | MLB |
| 1937-12-08 | Earl Grace | St. Louis Cardinals | Traded from Philadelphia Phillies to St. Louis Cardinals for Cap Clark | MLB |
| 1937-12-08 | Cap Clark | Philadelphia Phillies | Traded from St. Louis Cardinals to Philadelphia Phillies for Earl Grace | MLB |
| 1937-12-09 | Spencer Harris | | Traded from Boston Red Sox with Dom Dallessandro and Al Niemiec to San Diego (PCL) for Ted Williams (12/7/1937) | MLB |
| 1937-12-15 | Bud Hafey | St. Louis Cardinals | Traded from Pittsburgh Pirates with Tom Padden and Bernard Cobb to St. Louis Cardinals for Johnny Rizzo (10/13/1937) | MLB |
| 81 record(s) |