2007, Hall fought fellow future-UFC competitor Nate Diaz in the final of the US Open at purple belt, losing by submission and taking second place. ADCC head organizer Mo Jassim originally stated he was looking at booking Hall to return to professional grappling at the 2022 ADCC world championship. In March, 2022, Hall was given an official invite to compete in the 66kg division at the event. He withdrew from the event in June, 2022 after suffering a complete tear to his ACL. Hall has also published a number of instructional DVD sets, including one with an emphasis on the triangle choke, a signature technique used in his competitive career. Championships and accomplishments Brazilian jiu-jitsu Main Achievements: 2 x IBJJF Jiu-Jitsu World Champion (2007 / 2008 purple) IBJJF Jiu-Jitsu European Open Champion (2008 purple) IBJJF Chicago Jiu-Jitsu Open champion (2009 Absolute black belt) 3rd Place Brazilian National Jiu-Jitsu Championship (2008 purple) 3rd Place IBJJF Jiu-Jitsu World Championship (2009 brown) Grappling Main Achievements: ADCC US West Coast Trials winner (2009) 3rd Place ADCC Submission Fighting World Championship (2009) Mixed martial arts Ultimate Fighting Championship The Ultimate Fighter 22 Lightweight Winner Performance of the Night (One time) . MMA Fighting 2018 Submission of the Year vs. B.J. Penn CombatPress.com 2018 Submission of the Year vs. B.J. Penn Mixed martial arts record |- |Win |align=center|9–2 |Darrick Minner |Decision (unanimous) |UFC 269 | |align=center|3 |align=center|5:00 |Las Vegas, Nevada, United States | |- |Loss |align=center|8–2 |Ilia Topuria |KO (punches) |UFC 264 | |align=center|1 |align=center|4:47 |Las Vegas, Nevada, United States | |- |Win |align=center|8–1 |Darren Elkins |Decision (unanimous) |UFC Fight Night: de Randamie vs. Ladd | |align=center|3 |align=center|5:00 |Sacramento, California, United States | |- |Win |align=center|7–1 |B.J. Penn |Submission (heel hook) |UFC 232 | |align=center|1 |align=center|2:46 |Inglewood, California, United States | |- |Win |align=center|6–1 |Gray Maynard |Decision (unanimous) |The Ultimate Fighter: Tournament of Champions Finale | |align=center|3 |align=center|5:00 |Las Vegas, Nevada, United States | |- |Win |align=center|5–1 |Artem Lobov |Decision (unanimous) |The Ultimate Fighter: Team McGregor vs. Team Faber Finale | |align=center|3 |align=center|5:00 |Las Vegas, Nevada, United States | |- | Win | align=center| 4–1 | Ryan Hogans | Submission (heel hook) | UCL: Torres vs. Choate | | align=center| 1 | align=center| 1:53 | Hammond, Indiana, United States | |- | Win | align=center| 3–1 | Leonardo Perez | TKO (punches) | Fight Lab 35: Misery Loves Company 6 | | align=center| 3 | align=center|