| Episode cast overview, first billed only: |
 | Jeffrey T. Sammons | - | Himself |
 | Gerald Early | - | Himself - Author |
| Randy Roberts | - | Himself - Professor |
| Steve Farhood | - | Himself |
| Jack Newfield | - | Himself |
| George Dixon | - | Himself (archive footage) |
| Joe Gans | - | Himself (archive footage) |
| Terry McGovern | - | Himself (archive footage) |
| Jack Johnson | - | Himself (archive footage) |
| Tommy Burns | - | Himself (archive footage) |
| Tex Rickard | - | Himself (archive footage) |
| James J. Jeffries | - | Himself (archive footage) |
 | David Remnick | - | Himself - Author (archive footage) |
| Jess Willard | - | Himself (archive footage) |
| Nigel Collins | - | Himself |
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