| Affliction |
| BodogFIGHT |
| Cage Rage |
| Dream |
| EliteXC |
| Hardcore Championship Fighting |
| Inoki Genome Federation |
| International Fight League |
| K-1 |
| Maximum Fighting Championship |
| Pride Fighting Championships |
| Sengoku |
| Strikeforce |
| Ultimate Fighting Championship |
| World Extreme Cagefighting |
| World Fighting Alliance |
| Yarennoka |