| Al Lopez League | Forum | Trial | 08-29-1950 | 16 | 0 | Games paused |
| Bill Watkins League | Forum | Trial | 07-04-1950 | 16 | 10 | Filling (6 of 16), Games paused |
| Birdie Tebbetts League | Forum | Trial | 08-03-1952 | 16 | 0 | Games paused |
| Bob Ferguson League | Forum | Trial | 07-04-1950 | 16 | 9 | Filling (7 of 16), Games paused |
| Buddy Bell League | Forum | Trial | 07-04-1950 | 16 | 14 | Filling (2 of 16), Games paused |
| Charlie Finley League | Forum | Trial | 08-23-1951 | 16 | 0 | Games paused |
| Chick Stahl League | Forum | Trial | 09-12-1952 | 16 | 0 | Games paused |
| Darrell Johnson League | Forum | Trial | 03-03-1952 | 16 | 0 | |
| Dave Bristol League | Forum | Trial | 12-01-1952 | 16 | 0 | |
| Del Crandall League | Forum | Trial | 09-17-1950 | 16 | 0 | Games paused |
| Dick Howser League | Forum | Trial | 09-12-1951 | 16 | 0 | Games paused |
| Eddie Dyer League | Forum | Trial | 07-04-1950 | 16 | 9 | Filling (7 of 16), Games paused |
| Fred Mitchell League | Forum | Trial | 08-16-1951 | 16 | 0 | Games paused |
| George Huff League | Forum | Trial | 07-22-1950 | 16 | 0 | Games paused |
| Heinie Wagner League | Forum | Trial | 07-04-1950 | 16 | 1 | Filling (15 of 16), Games paused |
| Jim Bottomley League | Forum | Trial | 07-16-1952 | 16 | 0 | Games paused |
| Jim Lefebvre League | Forum | Trial | 11-01-1952 | 16 | 0 | |
| Joe Cantillon League | Forum | Trial | 08-29-1950 | 16 | 0 | Games paused |
| Joe Kelley League | Forum | Trial | 08-29-1951 | 16 | 0 | Games paused |
| Kerby Farrell League | Forum | Trial | 07-27-1951 | 16 | 0 | Games paused |
| Lena Blackburne League | Forum | Trial | 07-04-1950 | 16 | 9 | Filling (7 of 16), Games paused |
| Mayo Smith League | Forum | Trial | 07-04-1950 | 16 | 12 | Filling (4 of 16), Games paused |
| Mickey Cochrane League | Forum | Trial | 08-19-1952 | 16 | 0 | Games paused |
| Paul Richards League | Forum | Trial | 09-11-1950 | 16 | 0 | Games paused |
| Phil Regan League | Forum | Trial | 07-09-1950 | 16 | 0 | |
| Prince George Major League | Forum | Trial | 07-04-1950 | 16 | 15 | Filling (1 of 16), Games paused |
| Ray Miller League | Forum | Trial | 09-16-1951 | 16 | 0 | Games paused |
| Red Rolfe League | Forum | Trial | 08-08-1950 | 16 | 0 | Games paused |
| Sam Mele League | Forum | Trial | 08-22-1950 | 16 | 0 | Games paused |
| Tommy Lasorda League | Forum | Trial | 07-09-1951 | 16 | 0 | Games paused |
| Tony LaRussa League | Forum | Trial | 09-01-1950 | 16 | 0 | Games paused |
| Tony Muser League | Forum | Trial | 09-22-1951 | 16 | 0 | Games paused |
| Walt Alston League | Forum | Trial | 09-29-1950 | 16 | 0 | Games paused |
