J.J. Watt writes message to fans after back surgery

Houston Texans star J.J. Watt had back surgery last week, but he wrote a note to fans on Twitter to assure them that he'll be back on the field soon. Watt, who also had groin surgery in January, is expected to be ready for the regular season but will start camp on the physically unable to perform list. 

Watt writes that he's unable to do much, but he appreciates the support he's received from fans.