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

---The Kansas City Chiefs released cornerback Brandon Flowers in a move that is projected to save the team $7.25 million in salary cap space next season.

A second-round pick in 2008 out of Virginia Tech, Flowers played in 88 games with 87 starts in six seasons with the Chiefs. He has 17 regular-season interceptions and one in postseason play.

---Cornerback Chris Houston, who underwent toe surgery in May, was released by the Detroit Lions one season into a five-year, $25 million deal.

Houston will keep $2 million of his remaining contract, which was guaranteed for injury. He was listed as the starting left cornerback on the depth chart opposite 2013 second-round pick Darius Slay.

Without Houston, 2012 third-round pick Bill Bentley, veteran Rashean Mathis and fourth-round rookie Nevin Lawson are in line as potential starters.

---The Lions signed first-round draft pick Eric Ebron, a tight end from North Carolina.

Ebron, the No. 10 overall pick, signed a four-year deal worth an estimated $12.2 million with a $7.2 million signing bonus, according to the rookie wage scale. The Lions also have a fifth-year team option.

The Lions have all their rookie draft picks under contract.

---The Indianapolis Colts placed safety Corey Lynch on injured reserve with an undisclosed injury.

The Colts signed Lynch as a free agent in November 2013. In five games with Indianapolis last season, Lynch had six special teams tackles. He played the first three games of the season with the Tennessee Titans. The Titans released him on Nov. 22.

---New York Giants middle linebacker Jon Beason has a ligament tear and a small fracture to the sesamoid in his right foot but hopes to be ready for the start of the season.

Beason sustained the injuries during an organized team activity workout on Thursday.

The injuries were confirmed by team doctors after Beason underwent X-Rays, an MRI and CT scan. He will have further tests on Monday.

---The Minnesota Vikings signed free agent wide receiver Josh Cooper and waived wide receiver Lestar Jean.

Cooper was an undrafted rookie free agent of the Cleveland Browns in 2012 out of Oklahoma State. In two seasons with Cleveland, Cooper had 17 receptions for 166 yards in 11 games.

---The Pittsburgh Steelers signed third-round draft pick Dri Archer.

Archer, a wide receiver/running back, ran the 40-yard dash in 4.16 seconds at the NFL Scouting Combine in February. It was the fastest time recorded at a combine.

---Dallas Cowboys coach Jason Garrett said he expects backup quarterback Kyle Orton to attend next week's mandatory minicamp because he faces daily fines, which would total $69,455 for the three days.

Orton, 31, skipped the voluntary offseason program, including the 10 days of OTAs while contemplating his future. He would have to repay the Cowboys $3 million of his $5 million signing bonus if he retires. He is scheduled to make $3.25 million this season.

---The Tampa Bay Buccaneers signed defensive end Ronald Talley.

Talley was an undrafted rookie free agent of the Green Bay Packers in 2009. He spent his rookie season on the practice squad before signing with the Arizona Cardinals in 2010. He had 14 tackles, one sack and one pass breakup in 15 games (one start) in three seasons with the Cardinals.

The Buccaneers also waived wide receiver Aaron Burks and defensive tackle Everett Dawkins.