The son of former NFL wide receiver Joe Horn, Horn made an immediate impact as a true freshman at South Carolina, starting 10 out of 11 games.
He started in seven games in 2020, posting 16 tackles, six pass breakups, two interceptions and a tackle for loss. Horn received National Defensive Player of the Week for his performance on October 18th last season, after intercepting two passes with multiple pass breakups in a 30-22 win over Auburn.