After going undrafted in the 2020 NFL draft, Erdmann joined Fan Controlled Football as a member of the Wild Aces, with whom he won the FCF championship in its inaugural season.
Erdmann started all four years that he was at Saint John's, leading the Johnnies to the NCAA tournament quarterfinals in 2018, and to the semifinals in 2019.
[4] In 2021, Erdmann joined the Wild Aces of Fan Controlled Football and went on to win the league's inaugural championship.
After impressing in the FCF, Erdmann took part in the University of Minnesota pro day, which was attended by representatives from 31 NFL teams.
[5] He received interest from many teams, including having multiple workouts with the Minnesota Vikings, but did not sign an NFL contract.