UFC 15: Collision Course è l’evento del 17/10/1997
- Heavyweight Championship
- Weight class Method Round Time Notes
- Heavyweight Maurice Smith (c) vince su Tank Abbott Submission (exhaustion) 8:08
- Heavyweight Superfight
- Heavyweight Randy Couture vince su Vitor Belfort TKO (punches) 8:16
- Finals
- Heavyweight Mark Kerr vince su Dwayne Cason Submission (rear-naked choke) 0:53
- Semifinals
- Heavyweight Mark Kerr vince su Greg Stott KO (knee) 0:17
- Heavyweight Dave Beneteau vince su Carlos Barreto Decision (unanimous) 15:00
- Alternate bouts
- Heavyweight Alex Hunter vince su Harry Moskowitz Decision (split) 12:00
- Heavyweight Dwayne Cason vince su Houston Dorr TKO (punches) 3:43