Texans DE J.J. Watt has undergone back surgery and will start camp on physically unable to perform list but should be ready for the season.
Watt has never missed a game in his career and should ready for opener against the Bears.
Watt missed 2012 preseason because of an elbow injury, didn't miss a regular season game and won first NFL Defensive Player of Year award.
Fantasy Impact:
This would be a tough blow for the Texans defense if Watt were to miss any time.