Harrison attended Walnut Ridge High School in Columbus, Ohio, where he played football and basketball.

[1][2][3] On the football field, he switched between quarterback, wide receiver, running back, linebacker, and safety.

[5][6] He committed to play college football at Ohio State University following his senior season.

As a sophomore in 2017, he appeared in all 14 of Ohio State's games, compiling 36 tackles and two sacks.

[18] Harrison suffered a non-life-threatening injury after being shot in the left calf during a gathering in Cleveland on October 31, 2021.