3 weeks prior to the 2000 World Jiu-Jitsu Championship Believed to have earned the fastest Black belt of all Brazilian Jiu-Jitsu practitioners Brazilian Jiu-Jitsu World Jiu-Jitsu Championship World Jiu-Jitsu Championship Gold Medal; Black belt division World Jiu-Jitsu Championship Silver Medal; Blue belt division World Jiu-Jitsu Championship Bronze Medal; Brown belt division First American to win gold in the Black belt category Awards Nova União Competition Team (Reserved for the four top team competitors) 1997 - Blue belt awarded by Ralph Gracie 2000 - Black belt awarded by André Pederneiras 1 Penn unofficially unified the UFC Lightweight Championship when he defeated Sean Sherk at UFC 84. Mixed martial arts record |Loss |align=center| 16–14–2 |Clay Guida |Decision (unanimous) |UFC 237 | |align=center|3 |align=center|5:00 |Rio de Janeiro, Brazil | |- |Loss |align=center|16–13–2 |Ryan Hall |Submission (heel hook) |UFC 232 | |align=center|1 |align=center|2:46 |Inglewood, California, United States | |- |Loss |align=center|16–12–2 |Dennis Siver |Decision (majority) |UFC Fight Night: Chiesa vs. Lee | |align=center|3 |align=center|5:00 |Oklahoma City, Oklahoma, United States | |- |Loss |align=center|16–11–2 |Yair Rodríguez |TKO (front kick and punches) |UFC Fight Night: Rodríguez vs. Penn | |align=center|2 |align=center|0:24 |Phoenix, Arizona, United States | |- | Loss | align=center| | Frankie Edgar | TKO (punches) | The Ultimate Fighter: Team Edgar vs. Team Penn Finale | | align=center| 3 | align=center| 4:16 | Las Vegas, Nevada, United States | |- | Loss | align=center| 16–9–2 | Rory MacDonald | Decision (unanimous) | UFC on Fox: Henderson vs. Diaz | | align=center| 3 | align=center| 5:00 | Seattle, Washington, United States | |- | Loss | align=center| 16–8–2 | Nick Diaz | Decision (unanimous) | UFC 137 | | align=center| 3 | align=center| 5:00 | Las Vegas, Nevada, United States | |- | Draw | align=center| 16–7–2 | Jon Fitch | Draw (majority) | UFC 127 | | align=center| 3 | align=center| 5:00 | Sydney, Australia | |- | Win | align=center| 16–7–1 | Matt Hughes | KO (punches) | UFC 123 | | align=center| 1 | align=center| 0:21 | Auburn Hills, Michigan, United States | |- | Loss | align=center| 15–7–1 | Frankie Edgar | Decision (unanimous) | UFC 118 | | align=center| 5 | align=center| 5:00 | Boston, Massachusetts, United States | |- | Loss | align=center| 15–6–1 | Frankie Edgar | Decision (unanimous) | UFC 112 | | align=center| 5 | align=center| 5:00 | Abu Dhabi, United Arab Emirates | |- |