Cards' Palmer leaves game after hurting knee

GLENDALE, Ariz. (AP) Arizona Cardinals quarterback Carson Palmer left with an injured left knee early in the fourth quarter of Sunday's game against the St. Louis Rams.

Palmer appeared to hurt himself while planting his leg trying to avoid a sack. He was able to walk off the field, but was taken to the locker room on a cart after that.

Palmer missed three games earlier this season with a damaged nerve in his throwing shoulder.

On Friday, he signed a three-year contract extension worth a reported $50 million with $20.5 million guaranteed.

Arizona trailed 14-10 when Palmer left the game with 11:28 to play.

---

AP NFL website: www.pro32.ap.org and http://twitter.com/AP-NFL

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide—from Peter King, Tom Verducci, Lee Jenkins, Andy Staples, Grant Wahl, and more—delivered straight to you, along with up-to-the-minute news and live scores.