Immediately following his senior season Clowney went to Spartanburg for the Shrine Bowl of the Carolinas, where he registered 5 tackles (2 solo, 3 assists), 3 sacks for a loss of 15 yards, 2 tackles for a loss of 17 yards, and 2 quarterback hurries. Clowney was lined up against the North Carolina left tackle on every snap he played and drew five holding calls. After the Shrine Bowl, Clowney headed to Orlando, Florida, for a week of Under Armour All-America Game practices and then the all-star game itself. He was the leading tackler for the Red with seven and had 1.5 sacks. Recruiting analysts were particularly interested in his matchup with Cyrus Kouandjio.
