Texans linebacker Jadeveon Clowney left Sunday's win over the Titans with a lower back injury.

Eric Christian Smith AP Photo

After Houston Texans linebcaker Jadeveon Clowney was forced to leave Sunday's 20-6 win over the Tennessee Titans in the first half with a back injury, head coach Bill O'Brien said it was premature to label the second-year player as injury prone.

Clowney, the first pick in the 2014 draft has dealt with five injuries since joining the Texans, two of which required surgery. The 22-year-old has appeared in just 11 games since being drafted.

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"He's had some unlucky injuries," O'Brien said, per ESPN's Tania Ganguli. "There's no question about that. I don't think you can determine a career on a year and a half. I think that this guy's got a lot of football left in him. I think when he has played, I think he's played very well."

Last year, the former South Carolina star dealt with a sports hernia, a concussion, and a lateral meniscus tear in his knee before having season-ending microfracture surgery.

This season, Clowney missed the team's win over the Jaguars due to an ankle injury before hurting his back against the Titans.

O'Brien said he's hopeful the linebacker will be able to move past the series of early-career injuries and develop into a healthy, productive contributor for the Texans.

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