Rosholt continued wrestling at Oklahoma State University, following in the footsteps of his older brother, Jake, a three-time National Champion for the Cowboys.

[6] Rosholt's combination of size and speed had many wondering if he would follow the lead of his older brother Jake into MMA competition.

[7] Rosholt made his professional mixed martial arts debut on February 26, 2011, where he won by submission (punches) in just 1:17 of the first round.

Rosholt was expected to face promotional newcomer Alexey Oleynik on January 25, 2014, at UFC on Fox 10.

[24][25] In his first bout after the UFC, Rosholt began with a loss against Caio Alencar, suffering a knockout via punches in the first round at WSOF 34 on December 31, 2016.

After this, he rebounded against Nick Rossborough on July 29, 2017, with a unanimous decision victory at Professional Fighters League 2: Everett.

He made a comeback and defeated the same opponent, Kelvin Tiller, with a unanimous decision in a 2018 PFL Heavyweight Quarterfinal bout.

The year 2019 started with a loss to Denis Goltsov on June 6 in PFL 3, where he lost via TKO stoppage in the first round.

The winning streak continued as he defeated Muhammed Dereese with a TKO (punches) in a 2019 PFL Heavyweight Quarterfinal bout.