Running backs take a big hit

It was a rough day for NFL running backs.

Detroit's Kevin Jones, Baltimore's Willis McGahee, Indianapolis' Joseph Addai, the Giants' Brandon Jacobs and New Orleans backup Jamaal Branch all were banged up Sunday.

Jones' knee injury during the Lions' 25-20 win over the Kansas City Chiefs was the most severe. He caught a pass in the first half and after being tackled, immediately grabbed his right knee.

"It doesn't look good," Detroit coach Rod Marinelli said. "It's pretty serious."

Jones has been sidelined by injuries in each of his four seasons since Detroit drafted him in the first round of the 2004 draft. He was limited to 12 games last year with a foot injury, which led to him being on the physically unable to perform list during training camp and missing the first two games of this season.

McGahee broke two ribs on a hit in the first quarter of the Ravens' 27-6 loss to Seattle.