Defensive standouts J.J. Watt and No. 1 pick Jadeveon Clowney were on the field for the first time in Houston on Tuesday.
The Texans are hoping the two wreak havoc on opposing quarterbacks this season.
Clowney says he is going to watch Watt closely as the former NFL defensive player of the year prepares for the season.
Standout wide receiver Andre Johnson was absent from the session. One of the franchise's marquee players, Johnson said two weeks ago that he would not attend Texans workouts.