Managers of Ryan Dempster
| Manager Name |
|---|
| Dusty Baker |
| John Boles |
| Bob Boone |
| John Farrell |
| Fredi Gonzalez |
| Ray Knight |
| Jim Leyland |
| Dave Miley |
| Tony Perez |
| Lou Piniella |
| Mike Quade |
| Dale Sveum |
| Jeff Torborg |
| Alan Trammell |
| Ron Washington |
Barry Codell's Official Blog |
| The Daily Diamond