KANSAS CITY, Mo. -- Chiefs running back Kolby Smith injured his left ankle and probably will not return to Sunday's game against the Pittsburgh Steelers.
Watching football on Sundays will be a whole new experience with NFL Network's channel, NFL RedZone. Find out why
Smith made his first carry, then limped off the field. He was activated two weeks ago after missing a year with knee surgery.
Also, Steelers guard Chris Kemoeatu injured his right knee and will not return to the game. Team officials said Kemoeatu was hurt early in the third quarter.
The Steelers already were missing Pro Bowl safety Troy Polamalu, who wasn't active because of a knee injury.
Copyright 2009 by The Associated Press