After buying many Gracie Jiu Jitsu DVD's and attending seminars, he was able to develop his ground game to go along with his karate background.

[3] Arnett started his professional MMA career in 2012 and fought primarily on the regional circuit of the Pacific Northwest United States.

[4] Arnett faced Brandon Davis on August 1, 2017, at Dana White's Contender Series 4.

[17] Arnett was scheduled to face Dinis Paiva in a featherweight bout at CES MMA 61 on April 24, 2020.

[19] Arnett faced Daniel Vega in a catchweight bout at UAE Warriors 18 on March 20, 2021.