| Tm | Name | W | L | Start | End | |
|---|---|---|---|---|---|---|
| ANA | Bobby Winkles | 30 | 44 | Beg | 19740626 | |
| ANA | Whitey Herzog | 2 | 2 | 19740627 | 19740630 | |
| ANA | Dick Williams | 36 | 48 | 19740701 | End | |
| ATL | Eddie Mathews | 50 | 49 | Beg | 19740721 | |
| ATL | Clyde King | 38 | 25 | 19740725 | End | |
| BAL | Earl Weaver | 91 | 71 | Beg | End | |
| BOS | Darrell Johnson | 84 | 78 | Beg | End | |
| CHA | Chuck Tanner | 80 | 80 | Beg | End | |
| CHN | Whitey Lockman | 41 | 52 | Beg | 19740721 | |
| CHN | Jim Marshall | 25 | 44 | 19740725 | End | |
| CIN | Sparky Anderson | 98 | 64 | Beg | End | |
| CLE | Ken Aspromonte | 77 | 85 | Beg | End | |
| DET | Ralph Houk | 72 | 90 | Beg | End | |
| HOU | Preston Gomez | 81 | 81 | Beg | End | |
| KCA | Jack McKeon | 77 | 85 | Beg | End | |
| LAN | Walter Alston | 102 | 60 | Beg | End | |
| MIL | Del Crandall | 76 | 86 | Beg | End | |
| MIN | Frank Quilici | 82 | 80 | Beg | End | |
| NYA | Bill Virdon | 89 | 73 | Beg | End | |
| NYN | Yogi Berra | 71 | 91 | Beg | End | |
| OAK | Al Dark | 90 | 72 | Beg | End | |
| PHI | Danny Ozark | 80 | 82 | Beg | End | |
| PIT | Danny Murtaugh | 88 | 74 | Beg | End | |
| SDN | John McNamara | 60 | 102 | Beg | End | |
| SFN | Charlie Fox | 34 | 42 | Beg | 19740627 | |
| SFN | Wes Westrum | 38 | 48 | 19740628 | End | |
| SLN | Red Schoendienst | 86 | 75 | Beg | End | |
| TEX | Billy Martin | 84 | 76 | Beg | End | |
| WAS | Gene Mauch | 79 | 82 | Beg | End |
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