Jason High

High had one amateur fight in 2005, a submission win, before making his professional debut a month later. High won his first seven professional fights before making his debut in Affliction.

Jason High made his Affliction debut losing to Jay Hieron at the Day of Reckoning card. High was knocked unconscious by one of Hieron's punches.[8]

High later entered DREAM's welterweight grand prix. In the opening round of the tournament on April 5, 2009, he faced Yuya Shirai. High defeated Shirai quickly in the first round by rear naked choke. In the next round, at Dream 10, he upset Brazilian André Galvão by decision. He faced Marius Zaromskis in the finals, but was knocked out in the first round of the match.

High later signed with the UFC and made his debut against Charlie Brenneman on the preliminary card of UFC Fight Night: Florian vs. Gomi, losing via unanimous decision. After the loss to Brenneman, High was released from the organization.[9]

High moved back to his hometown of Kansas City and opened a facility in Leawood, Kansas with LC Davis and also began training at American Top Team in Coconut Creek, Florida. He rebounded from his two consecutive losses with a unanimous decision victory against Jordan Mein, a young, up and comer from Canada at RITC 40 in Taber, Alberta.[10] He followed that with a first round stoppage of the previously undefeated Keto Allen at Heat XC 6 on the 15th of October.

High faced Hayato Sakurai on December 31, 2010 at Dynamite!! 2010.[11] He won the fight via split decision.

High next faced Rudy Bears on January 28, 2011 at Titan Fighting 16. He won via submission in the first round.

On February 7, 2011, it was announced that High had signed a multi-fight contract with Strikeforce.[12] He made his debut at Strikeforce Challengers: Fodor vs. Terry and defeated Quinn Mulhern via unanimous decision.

In his second fight for the promotion, High faced Todd Moore in September 2011 at Strikeforce Challengers: Larkin vs. Rossborough. He won the fight via unanimous decision.

For his third Strikeforce fight, High fought Nate Moore in July 2012 on the preliminary card of Strikeforce: Rockhold vs. Kennedy. He won the fight via guillotine choke submission at just 26 seconds into the first round.

On January 8, 2013, High announced he signed a contract with the UFC.[13]

High was expected to face Ildemar Alcantara on June 8, 2013 at UFC on Fuel TV 10.[14] However, High was pulled from the bout with Alcantara in late April in favor of a bout on the same card against Erick Silva, after Silva's original opponent, John Hathaway was pulled from the event.[15] He lost the fight via triangle armbar submission.

High faced James Head on August 28, 2013 at UFC Fight Night 27.[16] He won the bout via first round guillotine choke submission.

High faced Anthony Lapsley on November 16, 2013 at UFC 167.[17] He won the fight via unanimous decision.

On an appearance with Ariel Helwani on The MMA Hour on November 18, 2013, High indicated an interest in dropping down to the Lightweight division. He is hoping to have his next fight (and Lightweight debut) sometime in early first quarter 2014.

High was expected to face Adlan Amagov on January 15, 2014 at UFC Fight Night 35,[18] However, Amagov pulled out of the bout due to injury and was replaced by promotional newcomer Baneil Dariush.[19] In turn, High pulled out of the bout citing appendicitis and was replaced by returning veteran Charlie Brenneman.[20]

High faced Rafael dos Anjos in a Lightweight bout on June 7, 2014 at UFC Fight Night 42.[21] He lost the fight via TKO in round two. High protested the stoppage, believing it to be too early, and proceeded to shove the referee. High was released from his UFC contract as a result.[22]

On August 18, 2015 it was announced that High had signed with the World Series of Fighting.[23] He made his promotional debut again fellow Strikeforce and UFC veteran Estevan Payan on November 20, 2015 at WSOF 25.[24] High won the fight via knockout in the second round.[25]

On March 23, 2016, it was announced that High will fight in the co-main event at WSOF 31 on June 17, 2016 against Bellator and UFC vet Mike Ricci.[26] He won via technical knockout in the second round.

High faced João Zeferino at WSOF 33 on October 7, 2016.[27] He lost via technical knockout in the third round.

High next faced Caros Fodor on June 30, 2017 at Professional Fighters League 36: Fitch vs. Foster. He won the fight via unanimous decision.

High faced Efrain Escudero in a lightweight tournament bout at PFL 2 in Chicago on June 21, 2018.[28] He lost the fight via technical submission in the third round. The ending was controversial as the referee stopped the bout when High quickly moved his hand under Escudero's body, resulting in the referee believing it was a tap. However, upon review of replays, it was clear High had not tapped.[29]

In his second fight in the tournament, High faced Natan Schulte on August 2, 2018 at PFL 5. He lost the fight via technical submission due to a rear-naked choke in the first round.[30]

High was then scheduled to face Johnny Case at PFL 7 on August 30, 2018 for the PFL playoff eliminator bout. However, High could not make weight and Case advanced to playoffs via walkover win.[31]

After the season 2018 of PFL, High was scheduled to face Josh Weston at FAC 2 on February 22, 2020. However, High withdrew due to unknown reason and the bout was rebooked to October 9, 2020. High won the bout via second-round knockout, claiming the inaugural FAC Welterweight Championship.[32]

High made his first title defense against Jake Lindsey at FAC 5 on December 11, 2020.[33] He won the fight via technical knockout in the fifth round.[34]

• DREAM
  • 2009 DREAM Welterweight Grand Prix Runner Up
• Fighting Alliance Championship
  • FAC Welterweight Championship (one time; current)
    • One successful title defense

• International Brazilian Jiu-Jitsu Federation
  • 2012 IBJJF World Championship winner (blue belt, medium-heavyweight)[35]