He played college basketball as a guard for the Michigan Wolverines, twice earning All-Big Ten and team MVP honors.

In high school, Horton was a McDonald's All-American and represented the United States national under-18 team in the 2002 FIBA Under-18 AmeriCup.

[1] Horton represented the United States national under-18 team in the 2002 FIBA Under-18 AmeriCup and was a starter in the McDonald's All-American Game in 2002.

Horton led the Wolverines in scoring, assists and steals, and finished the year fifth in the nation with a 90.1 free throw percentage (second all-time in Michigan basketball history), including a Big Ten single-season record with a 97.8 free throw percentage in conference games.

He left after a couple of months of not receiving his wages from the team, and signed with the Los Angeles D-Fenders in February 2007.