UFC 41: Onslaught was a mixed martial arts event held by the Ultimate Fighting Championship at the Boardwalk Hall in Atlantic City, New Jersey. UFC 41 featured two championship bouts, a Heavyweight Championship Bout between Ricco Rodriguez and Tim Sylvia, and a Lightweight Championship Bout between BJ Penn and Caol Uno. The event also marked the return of Tank Abbott to the UFC
| Actor | Role |
|---|---|
 Tim SylviaSelf | Self |
 Ricco RodriguezSelf | Self |
 Frank MirSelf | Self |
 Tank AbbottSelf | Self |
 B.J. PennSelf | Self |
 Caol UnoSelf | Self |
 Matt LindlandSelf | Self |
 Phil BaroniSelf | Self |
 Vladimir MatyushenkoSelf | Self |
 Pedro RizzoSelf | Self |
 Din ThomasSelf | Self |
 Matt SerraSelf | Self |
 Gan McGeeSelf | Self |
| AAlexandre DantasSelf | Self |
 Rich ClementiSelf | Self |
| YYves EdwardsSelf | Self |