According to a story on HoustonTexans.com, Texans OLB Mario Williams is set to have surgery on Friday to repair the left pectoral injury that ended his season after four-plus games.

Texans head coach Gary Kubiak said that the estimated recovery time from Williams' surgery is 3½-4 months. Williams, a two-time Pro Bowler, was placed on injured reserve on Wednesday.

"It's kind of sad," Kubiak said. "Boy, he was playing so well. I've said this before, but I know it's killing him because he was just so excited about what he was doing and what we were doing as a defensive football team. But Mario's going to have a great career. He's going to be fine … but it's been very difficult on him. Mario's always been a team guy, been a class act."

Williams, who started 75 consecutive games despite playing with assorted injuries during his first five NFL seasons, had a team-high five sacks, tied for the AFC lead, in his first five games under defensive coordinator Wade Phillips. He was injured while sacking Raiders QB Jason Campbell in the first quarter of the team's Week Five loss to Oakland.