| Tm | Name | W | L | Start | End | |
|---|---|---|---|---|---|---|
| BOS | Joe McCarthy | 96 | 59 | Beg | End | |
| BOS | Billy Southworth | 91 | 62 | Beg | End | |
| CHA | Ted Lyons | 51 | 101 | Beg | End | |
| CHN | Charlie Grimm | 64 | 90 | Beg | End | |
| CIN | Johnny Neun | 44 | 56 | Beg | 19480805 | |
| CIN | Bucky Walters | 20 | 33 | 19480806 | End | |
| CLE | Lou Boudreau | 97 | 58 | Beg | End | |
| DET | Steve O'Neill | 78 | 76 | Beg | End | |
| LAN | Leo Durocher | 35 | 37 | Beg | 19480711 | |
| LAN | Ray Blades | 1 | 0 | 19480715 | 19480715 | |
| LAN | Burt Shotton | 48 | 33 | 19480716 | End | |
| NYA | Bucky Harris | 94 | 60 | Beg | End | |
| OAK | Connie Mack | 84 | 70 | Beg | End | |
| PHI | Ben Chapman | 37 | 42 | Beg | 19480715 | |
| PHI | Dusty Cooke | 6 | 6 | 19480716 | 19480725 | |
| PHI | Eddie Sawyer | 23 | 40 | 19480727 | End | |
| PIT | Billy Meyer | 83 | 71 | Beg | End | |
| SFN | Mel Ott | 37 | 38 | Beg | 19480715 | |
| SFN | Leo Durocher | 41 | 38 | 19480717 | End | |
| SLN | Eddie Dyer | 85 | 69 | Beg | End | |
| SLN | Zack Taylor | 59 | 94 | Beg | End | |
| TEX | Joe Kuhel | 56 | 97 | Beg | End |
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