HOUSTON — J.J. Watt has re-injured his back, according to a person familiar with his condition, and the Houston Texans expect the star defensive end to be sidelined until at least December, and possibly the entire season.

The person spoke to The Associated Press on Tuesday night on condition of anonymity because the team hasn’t confirmed the injury.

Watt missed training camp and Houston’s four preseason games after surgery in July to repair a herniated disk in his back. He started each of the team’s three regular-season games and got hurt again Thursday against the Patriots.

It’s unclear if the injury will require surgery, but the person familiar with his condition told the AP he could be placed on injured reserve as early as Wednesday.

Watt, who has won Defensive Player of the Year for the past two seasons, didn’t practice on Monday, but Coach Bill O’Brien said he was just getting a day off.

It’s a major blow for Houston, which selected Watt with the 11th overall pick in the 2011 draft. Watt has played 83 consecutive games for the Texans despite various injuries, including torn core muscles and a broken hand last season.

This was a tough offseason for Watt, who had surgery in January to repair five torn core muscles before going under the knife again in July to repair his back. There was a time after his surgery in January where he wondered about his future in the NFL.

“After the first surgery there were some days there where I really questioned whether or not I’d ever be able to play again,” he said earlier this month. “Just some of the stuff we were dealing with from a rehab standpoint, just the way that the recovery was going early on … there was a very low point there and it was tough.”

WASHINGTON: Center Kory Lichtensteiger was put on injured reserve with an injured calf and free-agent center John Sullivan was signed.

Vikings: Minnesota promoted rookie guard Willie Beavers from the practice squad for depth on an offensive line that’s been dogged by injuries this season.

Jaguars: Left tackle Kelvin Beachum was cleared from the NFL’s concussion protocol and will practice Wednesday.

He is likely to play against Indianapolis in London on Sunday.

COLTS: The Colts put outside linebacker Trent Cole on injured reserve.

Cole is in the final year of a two-year deal he signed last season and had been dealing with an injured back, though he was credited with one tackle in Sunday’s 26-22 victory over San Diego.

Indy (1-2) made no immediate announcement about who would take Cole’s spot on the active roster.