HOUSTON - Jadeveon Clowney says he suffered a concussion in a joint practice with Denver last month but has been cleared to play for the Houston Texans in their season-opener Sunday against the Washington Redskins.

Clowney, the No. 1 selection in the NFL draft who played for the South Carolina Gamecocks, left a practice on Aug. 20 after a helmet-to-helmet hit with Broncos tight end Jacob Tamme. He missed the Texans' final two preseason games, but says he passed the league protocols for head injuries in just over a week and will play on Sunday.

Clowney had sports hernia surgery in June and missed the team's minicamp and had been limited in training camp.