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WEC 51: Aldo vs. Gamburyan took place on September 30, 2010 at the 1stBank Center in Broomfield, Colorado. The event was the first that the WEC has hosted in Colorado.
WEC 51 Previews & Predictions
| Match | Winner | Loser | Method | Round | Time |
| 1 | Demetrious Johnson | Nick Pace | Decision (Unanimous) | 3 | 5:00 |
| 2 | Antonio Banuelos | Chad George | Decision (Unanimous) | 3 | 5:00 |
| 3 | Diego Nunes | Tyler Toner | Decision (Unanimous) | 3 | 5:00 |
| 4 | Chris Horodecki | Ed Ratcliff | Decision (Split) | 3 | 5:00 |
| 5 | Mike Thomas Brown | Cole Province | TKO (Punches) | 1 | 1:18 |
| 6 | Tie Quan Zhang | Pablo Garza | Submission (Guillotine Choke) | 1 | 2:26 |
| 7 | Mark Hominick | Leonard Garcia | Decision (Split) | 3 | 5:00 |
| 8 | George Roop | Chan Sung Jung | KO (Head Kick) | 2 | 1:30 |
| 9 | Miguel Torres | Charlie Valencia | Submission (Rear-Naked Choke) | 2 | 2:25 |
| 10 | Donald Cerrone | Jamie Varner | Decision (Unanimous) | 3 | 5:00 |
| 11 | Jose Aldo | Manny Gamburyan | KO (Punches) | 2 | 1:32 |
