Texans owner Bob McNair ordered the team's staff to go through the locker room to make sure no players are using banned substances. Houston had staff members remove any products from lockers that are not approved by the NFL. Two of Houston's players -- left tackle Duane Brown and linebacker Brian Cushing -- served four-game suspensions for different violations of the league's policy on banned substances. McNair said Friday he wanted to take a step to prevent future occurrences.