Organizace Extreme Cagefighting Organization pořádala první akci 29. 8. 2009 pod názvem 'ECO 1 - Ground Zero' (Ho-Chunk Convention Center, Dells, Wisconsin, United States).
Do dnešního dne uspořádala celkem 8 akcí (USA).
Extreme Cagefighting Organization
| Datum | Země | Název, adresa |
|---|---|---|
| 19.3.2011 |  | ECO - Extreme Cagefighting Organization 8 Wisconsin Dells Center, Wisconsin Dells, Wisconsin, United States |
| 21.8.2010 | | ECO - Extreme Cagefighting Organization 7 Wisconsin Dells Center, Wisconsin Dells, Wisconsin, United States |
| 10.7.2010 | | ECO - Extreme Cagefighting Organization 6 Ho Chunk Casino, Baraboo, Wisconsin, United States |
| 8.5.2010 | | ECO - Extreme Cagefighting Organization 5 Ho-Chunk Casino, Dells, Wisconsin, United States |
| 20.3.2010 | | ECO - Extreme Cagefighting Organization 4 Ho-Chunk Casino, Dells, Wisconsin, United States |
| 16.1.2010 | | ECO - Extreme Cagefighting Organization 3 Ho-Chunk Casino, Baraboo, Wisconsin, United States |
| 14.11.2009 | | ECO 2 - Boneyard Massacre Ho-Chunk Convention Center, Dells, Wisconsin, United States |
| 29.8.2009 | | ECO 1 - Ground Zero Ho-Chunk Convention Center, Dells, Wisconsin, United States |
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