Mix was born in Angola, New York, a small village approximately 20 miles outside of Buffalo.
As Mix described his childhood, “We didn't really have a lot growing up, my mom had food stamps and stuff, I just remember various ways to get money.
I'd sell my school lunch to get a dollar, I'd go and beat up another kid in an arranged fight for 20 bucks.
"[5] Making his pro debut in May 2016, Mix began regularly fighting for the King of the Cage promotion.
He made his promotional debut on June 14, 2019 at Bellator 222, facing highly touted prospect Ricky Bandejas.
[7] Mix was victorious rather quickly, showing a superior ground game and submitting Bandejas with a rear-naked choke just 66 seconds into the first round.
[10] Mix once again showed dominance on the ground, submitting Chapman with a Suloev stretch kneebar in the first round.
[16] Mix lost the bout via unanimous decision, thus facing defeat for the first time in either his amateur or professional MMA career.
[29] He won the bout, the title, and the $1 million prize, knocking out Stots with a step up knee in the first round.
[31] He won the bout and unified the belt, submitting Pettis in the second round via rear-naked choke.
[34] Mix was scheduled to make the second defense of his title against Leandro Higo on November 16, 2024, at Bellator Champions Series 6.