UFC 137: Penn vs. Diaz
| Sport: | MMA |
| Promotion: | UFC |
| Date: | Oct. 29, 2011 |
| Venue: | Mandalay Bay Events Center |
| City: | Las Vegas, Nevada |
| Broadcast: | Pay-Per-View |
Co-Main Event
Heavyweight Cheick Kongo def. Matt Mitrione
Unanimous decision () at 5:00 of Round 3