Houston Texans defensive tackle Cedric Killings left the field on a stretcher and was taken to a hospital Sunday after a headfirst collision with Indianapolis Colts receiver Roy Hall.
The Texans said Killings suffered a neck injury but had feeling in his extremities.
The injury occurred on a kickoff return, when the 6-foot-3, 310-pound Killings hit Hall on a block as Jerome Mathis was running back a second-quarter kick during the 30-24 loss. Hall and Killings went down together and Hall walked slowly off the field with trainers helping him.
Colts coach Tony Dungy said Hall suffered a shoulder injury.
Killings lay motionless as trainers attended to him and a stretcher was wheeled onto the field.
Houston coach Gary Kubiak said Killings had a deep cut under his right eye. He was moving his arms and legs and speaking as he was being treated on the field, Kubiak said.
Early in the second quarter Sunday, Houston running back Ahman Green left with a left knee sprain. Green caught a short pass and was tackled after a 9-yard gain by Colts safety Bob Sanders.
Houston rookie Jacoby Jones left in the third quarter after separating his left shoulder on a 74-yard punt return. Jones is the Texans' leading kick returner and started for the first time Sunday in place of wide receiver Andre Johnson, who injured his left knee last week. Houston center Steve McKinney left with a sprained knee in the fourth quarter.
Buffalo quarterback J.P. Losman sprained his left knee on the first play of the Bills' 38-7 loss to the Patriots. Coach Dick Jauron said he expects Losman to miss a couple of weeks.
The Bills got a scare - and lost another starter - when linebacker Paul Posluszny was injured early in the second quarter and remained on the field for about 10 minutes. Players from both teams watched intently as a golf cart was brought onto the field, but Posluszny climbed in on his own.
Posluszny has a broken left forearm and is scheduled for surgery on Monday for what may be a season-ending injury, Jauron said.
Eagles running back Brian Westbrook bruised his ribs in Philadelphia's 56-21 win over Detroit and will undergo more tests Monday.
Six-time Pro Bowl safety Brian Dawkins (neck) and two-time Pro Bowl cornerback Lito Sheppard (knee) sat out for the Eagles.
Pittsburgh Steelers wide receiver Hines Ward bruised a leg bone while absorbing a hard hit from 49ers safety Mark Roman in the third quarter and left the 37-16 win. The four-time Pro Bowl receiver had one catch for 2 yards and a 7-yard run.
San Francisco running back Frank Gore, who missed most of the preseason with a broken right hand, had precautionary X-rays on his hand that were negative after being held to 39 yards.
Carolina quarterback Jake Delhomme left the Panthers' 27-20 win over the Atlanta Falcons due to a right elbow injury, which he doesn't believe is serious. Delhomme began shaking his arm and motioning toward the sideline after he delivered a short pass to Brad Hoover late in the third quarter.
Miami Dolphins middle linebacker Zach Thomas was inactive for their 31-28 loss to the New York Jets after tests revealed earlier in the week he has a mild concussion.
Ravens quarterback Steve McNair returned after missing last week's game due to a groin injury, but coach Brian Billick took him out because he thought he was favoring it in Baltimore's 26-23 win over the Arizona Cardinals.
Chicago Pro Bowl linebacker Lance Briggs left the Bears' game against the Dallas Cowboys with a groin injury.
Also injured Sunday were: Chargers defensive end Luis Castillo (foot), Denver quarterback Jay Cutler (mild ankle sprain), Detroit receiver Calvin Johnson (bruised lower back), Cincinnati running back Rudi Johnson (hamstring), Denver safety John Lynch (strained groin), Cincinnati linebacker Anthony Schlegel (back), Buffalo kick returner Josh Scobey (knee), St. Louis offensive guard Mark Setterstrom (knee), Denver fullback Paul Smith (neck), Jacksonville running back Fred Taylor (bruised leg), Eagles left tackle William Thomas (mild knee strain) and Buffalo offensive lineman Jason Whittle (hamstring).