The Houston Texans will be without their No 1 overall pick for 46 weeks. Jadeveon Clowney just had arthroscopic surgery on his right knee Monday and won't be able play.

Coach Bill O'Brien said "I'm not a doctor so I don't know. 'It's just something they went in there and tried to fix it. It seems like it went well."

Clowney was injured during the second quarter of last Sunday's game against Washington Redskins where they successfully won. He was hurt when he jumped up to try and bat down a pass. He put his hand to his right knee and began limping after he landed.

Some speculated that the injury happened when Clowney's foot slipped between one of the 8 by 8 foot palletes which is made of real grass. For this, his coach said that he was not aware of.

He said "He didn't say anything to me about that. From looking at all the angles on film, he just came down awkwardly. Most of those types of injuries are non-contact."

Safety D.J. Swearinger talked to Clowney together with other Texans and said "That's just something you don't want to happen as a rookie, as anybody really. 'But as a rookie coming in having a lot of the hype that he has, that's something he doesn't want to happen. I feel his frustration."

But this is not the first time the Clown has been out of the team due to injury.

He left a dual practice Aug. 20 after a helmet-to-helmet hit with Denver Broncos tight end Jacob Tamme. He missed the Texans' final two preseason games, but said he passed the NFL protocols for head injuries in just over a week. He had to sit out the beginning of camp, too, after offseason surgery to repair a sports hernia.

He'll be replaced by Whitney Mercilus. According to O'Brien "He got pressure on the quarterback, played the run well and he just has to continue to get better and better. And I think he'll do that."

He added "I think he's learning the scheme. It's different than what he played in the previous scheme. It's not the easiest thing to learn right away for some players. He's improved the last two weeks."