Sports

Cardinals' Palmer leaves game after hurting left knee

  • Arizona Cardinals quarterback Carson Palmer (3) is sacked by St. Louis Rams strong safety T.J. McDonald (25) during the first half of an NFL football game, Sunday, Nov. 9, 2014, in Glendale, Ariz. (AP Photo/Rick Scuteri)

    Arizona Cardinals quarterback Carson Palmer (3) is sacked by St. Louis Rams strong safety T.J. McDonald (25) during the first half of an NFL football game, Sunday, Nov. 9, 2014, in Glendale, Ariz. (AP Photo/Rick Scuteri)  (The Associated Press)

  • Arizona Cardinals quarterback Carson Palmer (3) throws to Larry Fitzgerald (11) during the first half of an NFL football game against the St. Louis Rams, Sunday, Nov. 9, 2014, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

    Arizona Cardinals quarterback Carson Palmer (3) throws to Larry Fitzgerald (11) during the first half of an NFL football game against the St. Louis Rams, Sunday, Nov. 9, 2014, in Glendale, Ariz. (AP Photo/Ross D. Franklin)  (The Associated Press)

  • Arizona Cardinals quarterback Carson Palmer (3) warms up prior to an NFL football game against the St. Louis Rams, Sunday, Nov. 9, 2014, in Glendale, Ariz. (AP Photo/Rick Scuteri)

    Arizona Cardinals quarterback Carson Palmer (3) warms up prior to an NFL football game against the St. Louis Rams, Sunday, Nov. 9, 2014, in Glendale, Ariz. (AP Photo/Rick Scuteri)  (The Associated Press)

Arizona Cardinals quarterback Carson Palmer left with an injured left knee early in the third 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.

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