WEC MMA events in 2004
WEC 11: Evolution was a mixed martial arts event promoted by World Extreme Cagefighting on August 20, 2004 at the Tachi Palace Hotel & Casino in Lemoore, California. The main event saw Shonie Carter take on Jason Biswell.
| Main Card |
| Weight class | | | | Method | Round | Time | Notes |
| | Shonie Carter | def. | Jason Biswell | TKO (Elbows) | 1 | 3:13 | |
| | Richard Montoya | def. | Abraham Baxter | Decision (Unanimous) | 3 | 5:00 | |
| | Lavar Johnson | def. | Fred Diaz | KO (Punches) | 1 | 1:33 | |
| | Rafael del Real | def. | Michael MacDonald | TKO (Punches) | 2 | 2:35 | |
| | Olaf Alfonso | def. | Philip Perez | TKO (Elbows) | 1 | 2:57 | |
| | Carlos Garcia | def. | Seth Woodill | KO (Punch) | 1 | 0:25 | |
| | Emanuel Newton | def. | Andre Mussi | Decision (Unanimous) | 3 | 5:00 | |
| | Nick Ertl | def. | Nam Phan | Decision (Split) | 3 | 5:00 | |
| Heavyweight | James Irvin | def. | Jody Poff | TKO (Punches) | 1 | 1:44 | |
| Lightweight | Gabe Ruediger | def. | Steve Ramirez | Submission (Triangle Choke) | 1 | 1:24 | |
| | Josh Green | def. | Bill Coffman | Submission (Triangle Armbar) | 1 | 1:19 | |
| | Brad Mohler | def. | Rob Clarke | TKO (Corner Stoppage) | 3 | 3:59 | |
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