| Tm | Name | W | L | Start | End | |
|---|---|---|---|---|---|---|
| ANA | Doug Rader | 91 | 71 | Beg | End | |
| ATL | Russ Nixon | 63 | 97 | Beg | End | |
| BAL | Frank Robinson | 87 | 75 | Beg | End | |
| BOS | Joe Morgan | 83 | 79 | Beg | End | |
| CHA | Jeff Torborg | 69 | 92 | Beg | End | |
| CHN | Don Zimmer | 93 | 69 | Beg | End | |
| CIN | Pete Rose | 59 | 66 | Beg | 19890821 | |
| CIN | Tommy Helms | 16 | 21 | 19890822 | End | |
| CLE | Doc Edwards | 65 | 78 | Beg | 19890910 | |
| CLE | John Hart | 8 | 11 | 19890912 | End | |
| DET | Sparky Anderson | 59 | 103 | Beg | End | |
| HOU | Art Howe | 86 | 76 | Beg | End | |
| KCA | John Wathan | 92 | 70 | Beg | End | |
| LAN | Tom Lasorda | 77 | 83 | Beg | End | |
| MIL | Tom Trebelhorn | 81 | 81 | Beg | End | |
| MIN | Tom Kelly | 80 | 82 | Beg | End | |
| NYA | Dallas Green | 56 | 65 | Beg | 19890817 | |
| NYA | Bucky Dent | 18 | 22 | 19890818 | End | |
| NYN | Davey Johnson | 87 | 75 | Beg | End | |
| OAK | Tony LaRussa | 99 | 63 | Beg | End | |
| PHI | Nick Leyva | 67 | 95 | Beg | End | |
| PIT | Jim Leyland | 74 | 88 | Beg | End | |
| SDN | Jack McKeon | 89 | 73 | Beg | End | |
| SEA | Jim Lefebvre | 73 | 89 | Beg | End | |
| SFN | Roger Craig | 92 | 70 | Beg | End | |
| SLN | Whitey Herzog | 86 | 76 | Beg | End | |
| TEX | Bobby Valentine | 83 | 79 | Beg | End | |
| TOR | Jimy Williams | 12 | 24 | Beg | 19890514 | |
| TOR | Cito Gaston | 77 | 49 | 19890515 | End | |
| WAS | Buck Rodgers | 81 | 81 | Beg | End |
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