| Tm | Name | W | L | Start | End | |
|---|---|---|---|---|---|---|
| BOS | Frank Bowerman | 22 | 54 | Beg | 19090716 | |
| BOS | Fred Lake | 88 | 63 | Beg | End | |
| BOS | Harry Smith | 23 | 54 | 19090717 | End | |
| CHA | Billy Sullivan | 78 | 74 | Beg | End | |
| CHN | Frank Chance | 104 | 49 | Beg | End | |
| CIN | Clark Griffith | 77 | 76 | Beg | End | |
| CLE | Nap Lajoie | 57 | 57 | Beg | 19090821 | |
| CLE | Deacon McGuire | 14 | 25 | 19090823 | End | |
| DET | Hughie Jennings | 98 | 54 | Beg | End | |
| LAN | Harry Lumley | 55 | 98 | Beg | End | |
| NYA | George Stallings | 74 | 77 | Beg | End | |
| OAK | Connie Mack | 95 | 58 | Beg | End | |
| PHI | Billy Murray | 74 | 79 | Beg | End | |
| PIT | Fred Clarke | 110 | 42 | Beg | End | |
| SFN | John McGraw | 92 | 61 | Beg | End | |
| SLN | Roger Bresnahan | 54 | 98 | Beg | End | |
| SLN | Jimmy McAleer | 61 | 89 | Beg | End | |
| TEX | Joe Cantillon | 42 | 110 | Beg | End |
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