"Outside linebacker Mario Williams is out for the season with a torn pectoral muscle that will require surgery this week.

Rookie Brooks Reed, a second-round pick, will take his place.

Williams had just recorded his fifth sack of the season, a first-quarter takedown of Oakland quarterback Jason Campbell for a 1-yard loss. But one play later, on third down, Williams was running off the field at Reliant Stadium, hardly moving his arms."