[1][2] He started college at Oglethorpe University in Atlanta where he played NCAA Division III basketball.

Prohm made it less than halfway through his first season as a player when he left the team to follow his passion for coaching.

In his first season, he led the Racers to their third straight Ohio Valley Conference regular-season title, a school record-tying 31 wins (including a school-best 23–0 start), a top-10 national ranking and an appearance in the NCAA Tournament.

[7] In his first season with the Cyclones, he managed to secure a #4 seed in the Midwest region, where they defeated Iona and Little Rock to advance to the Sweet Sixteen, where they fell to top-seeded Virginia, 84–71.

However, on February 4, 2017, they stunned third-ranked Kansas, 92–89, in overtime, snapping the Jayhawks' 54-game home winning streak.

[9] On March 25, 2022, Murray State announced that Prohm would return to the university as head coach following the departure of Matt McMahon to LSU.