Carson Palmer officially ruled out for Thursday's game against the 49ers

Arizona Cardinals head coach Bruce Arians told reporters on Wednesday that starting quarterback Carson Palmer has been ruled out and won't make the trip for Thursday night's game against the 49ers.

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Arians, "He seemed fine this morning"; added Palmer put up an argument but optimistic for the following week #AZvsSF
— Craig Grialou (@CraigAZSports) October 5, 2016

Palmer suffered a concussion late in the fourth quarter of Sunday's 17-13 home loss to the Rams. Drew Stanton, who will get the start Thursday, came in and threw interceptions on consecutive drives to end the Cardinals' comeback hopes.

Stanton, 32, has been with the Cardinals for three seasons. He started eight games for the team in 2014, and finished with a 5-3 record despite completing just 55 percent of his passes and throwing for seven touchdowns and five interceptions. He made two brief appearances last season, throwing two interceptions on 25 pass attempts.