Texans outside linebacker Jadeveon Clowney works with linebackers coach Mike Vrabel during practice on Thursday. (Brett Coomer/Houston Chronicle) Rookie linebacker Jadeveon Clowney will likely be limited to third downs if he plays Sunday at the Tennessee Titans, according to Texans defensive coordinator Romeo Crennel. “He hasn’t been practicing and so you can put him in there in third down and just rush the passer with him and see how that goes,” Crennel said Thursday at NRG Stadium.