The No. 148-ranked overall prospect, who is the cousin of NFL star Jadeveon Clowney, previously pledged to LSU but reversed his decision in December.
Clowney is now Ole Miss' highest-ranked commitment. His addition comes just days after four-star running back Henry Parrish announced he would also be joining the Rebels.
The 6-foot-4, 220-pound pass-rusher played at St. Frances Academy in Baltimore.