[3] Schlottmann enrolled at TCU in the summer of 2014, and played in all 13 of the Frogs' games that fall as true freshman.

That season, the team won a Big 12 Conference championship and ranked third in the final polls after blowing out Ole Miss 42–3 in the Peach Bowl.

In the 2019 season, he made the active roster as second-string left guard coming out of training camp.

[9][10] Schlottman made his regular season debut on September 9, 2019, against the Oakland Raiders on Monday Night Football.

He was named the starting right guard in Week 14 after starter Ronald Leary was out for the rest of the season; second-string right guard Elijah Wilkinson was moved to right tackle to fill in for starting RT Ja'Wuan James out with a knee injury.