After leading Englewood to a 28–6 victory over rival Lake View, a Chicago newspaper wrote The playing of Teetzel was the feature of the game.

[4]The Englewood school newspaper lauded his contributions as follows Clayton Teetzel, at Right half back, deserves considerable more space than we can allot to him.

[2]After graduating from high school, Teetzel enrolled at the University of Michigan where he played football and also ran for the track team.

Teetzel played end for the 1897 Michigan Wolverines football team that compiled a record of 6–1–1 and outscored its opponents by a combined score of 168 to 31.

[6]Teetzel also played at the end position for the undefeated 1898 Michigan Wolverines football team that won the university's first Western Conference championship.

While doing some fancy stunts in the gymnasium in the Brighasn Young University at Provo, Utah, on March 6, he fell and broke his leg four inches above the ankle.

[11]In early 1905, Teetzel, a non-Mormon, was hired to supervise the extracurricular sports program at Brigham Young University (BYU).

"[12] In April 1905, Teetzel led Brigham Young's track team in its first dual meet in six years against the University of Utah.

It was reported in the local press that Teetzel, "one of the greatest sprinters that ever left Michigan," had taught the Brigham Young men his stride.

After coaching Benton Harbor to an undefeated season, he returned to Provo where BYU's athletes were reportedly pleased to have him back.

[17] Teetzel's duties at Utah State included coaching the basketball, baseball, football, track, wrestling, swimming and boxing teams.

[18][19][20] Teetzel recruited athletes from California and elsewhere and developed one of the top track teams in the far west,[21] while also training dozens of men in boxing and wrestling.

As coach of the Utah State football team, Teetzel compiled the following record: After seven years as the head of the athletic department at Utah State, Teetzel announced in early 1916 that he was taking an extended vacation trip to California and would return to Logan the latter part of the year.