He currently competes in the Bare Knuckle Fighting Championship, where he is a former BKFC Bantamweight Champion.
As a mixed martial artist, he has competed in the Flyweight, Bantamweight and Lightweight division.
[2] In his BKFC debut, Barnett faced Travis Thompson at the inaugural Bare Knuckle FC event held on June 2, 2018.
[5][6] Heading into the tournament final, Barnett faced Johnny Bedford on June 22, 2019, at BKFC 6.
[7] Barnett faced Matt Murphy on February 15, 2020, at BKFC 10: Lombard vs Mundell.
[15] In his first title defense, Barnett faced Daniel Alvarez at BKFC 39 on March 24, 2023.