He played college football for the Michigan Wolverines, winning three consecutive Big Ten Conference titles and a national championship in 2023.

Harrell was a four star recruit, and named to the PrepStar Magazine Top 150 Dream Team, as the #137 ranked player in the nation.

In 2023, Harrell returned to Michigan for his senior season, winning a national championship.

Harrell was selected in the seventh round, 252nd overall, by the Tennessee Titans in the 2024 NFL draft.

[14] Harrell began the 2024 season on special teams and third on the depth chart at weakside linebacker.