HOUSTON -- Houston Texans rookie outside linebacker Jadeveon Clowney had sports hernia surgery, coach Bill O'Brien said Friday at NRG Stadium.

Clowney, the No. 1 overall pick of the 2014 NFL draft, has been dealing with a groin injury. O'Brien said Clowney was evaluated in Philadelphia and the team decided the best option was surgery. He will miss next week's mandatory three-day minicamp and is expected to return for training camp, which begins in late July.

O'Brien said Clowney had not been dealing with the injury for long. The Texans decided it was best to immediately address the issue, which was why surgery occurred Thursday.

"It was the best thing for J.D. and the best thing for our team and the best thing for our organization," O'Brien said.

Clowney is expected to return to Houston on Friday afternoon.

"He'll be ready to go for training camp," O'Brien said. "That's about all I'll say about that."

Clowney was limited during the NFL Scouting Combine and dealt with a groin issue during South Carolina's pro day.