But why did he do it with offers from other great programs? Ray McCallum Sr., his father, just so happens to be the coach of the Titans.
This 6-foot-1 guard turned down offers from Arizona, Florida, and UCLA to go play with the man who taught him the basics of basketball growing up.
As a senior in high school, McCallum averaged 22.5 points a game while leading his team a State Title.
A recruit in this special situation could be someone who comes in and completely changes the program.
Besides being the top ranked recruit to ever sign with Detroit, he's also one of the few players to decide to not go to a BCS Conference school or Memphis.
The scouts all say that what makes McCallum stand out in his play is him being one of the top floor generals in this class. He's known to play like a true point and can take over a game with his offensive and defensive play.
Detroit finished 20-14 and 9-9 last season in Horizon League play, including a great game with National Championship Runners-Up, Butler, as they took them to overtime and just falling two points short.
However, the seventh place finish in their conference is sure to be topped next season with McCallum's commitment, as he looks to get them back in the top of the Horizon League.
He'll also be joined, though, by 6-9 Power Forward, Jordan Manuel and shooting guard, Frank Williams.
Detroit's recruiting class is looking very strong heading into the season, ranked as one of the top in the Horizon Conference. They can only hope that it will result in wins and success for coach, Ray McCallum Sr.
The addition of his son won't hurt either.
Written By Collin O'Connor