Early career In August 2014, Bhullar had his first amateur fight as a mixed martial artist. He turned pro in November of that year fighting with the Battlefield Fight League. Over the next few years, Bhullar competed exclusively in his native Canada and remained undefeated with a record of six wins. Arjan won the vacant BFL Heavyweight Title with a victory over Blake Nash on October 17, 2015. He defended the title twice.
Ultimate Fighting Championship Bhullar made his promotional debut at
UFC 215 on September 9, 2017, against
Luis Henrique. He won the fight via unanimous decision. Bhullar's next fight was against
Adam Wieczorek on April 14, 2018, at
UFC on Fox 29. After controlling the first round with his wrestling, Bhullar would get caught with an omoplata early in the second round, officially losing the fight via submission in round 2. For his third fight with the promotion, Bhullar faced
Marcelo Golm on October 27, 2018, at
UFC Fight Night 138. He won the fight via unanimous decision. Bhullar next faced
Juan Adams on May 4, 2019, at
UFC Fight Night 151. He won the fight by unanimous decision. The fight marked the last fight of his prevailing contract with the UFC.
ONE Championship On July 3, 2019, it was announced that Bhullar signed a deal with Asia-based MMA promotion
ONE Championship, and was expected to make his promotional debut against Mauro Cerilli at
ONE Championship: Dawn of Heroes on August 2, 2019. However, Cerilli pulled out of the bout due to staph infection and the fight was cancelled. The fight eventually took place at
ONE Championship: Century on October 13, 2019, with Bhullar winning by unanimous decision.
ONE Heavyweight World Champion On February 1, 2020, it was announced that Bhullar would be challenging
Brandon Vera for the
ONE Heavyweight World Championship at
ONE Championship: Code of Honor on May 29, 2020, but the fight was cancelled due to the
COVID-19 pandemic. The bout was rebooked to take place at
ONE Championship: Dangal on May 15, 2021. He defeated Vera via second-round technical knockout to win the ONE Heavyweight World Championship, becoming the first fighter of Canadian/Indian descent to win an MMA world title. After a contract dispute, Bhullar eventually signed a new contract with the organization and was scheduled to face interim champion
Anatoly Malykhin for the
ONE Heavyweight World Championship unification bout at
ONE 161 on September 29, 2022. However, Bhullar withdrew due to an injury in training, It was announced that Bhullar had surgery on the arm two weeks prior and the bout was cancelled. The bout was rescheduled for March 25, 2023, at
ONE Fight Night 8. In turn, the bout was removed from the event due to a shift in broadcaster commitments and the bout will be rescheduled again to a later date. The bout was scheduled on July 15, 2023, at
ONE Fight Night 12. However, for unknown reasons, the bout was moved to
ONE Friday Fights 22 on June 22. He lost the fight via disqualification due to timidity in round three. ==Personal life==