NFL: Cardinals Carson Palmer out for season after tearing cruciate

Arizona Cardinals quarterback Carson Palmer will miss the rest of the NFL season after tearing a cruciate ligament.

Palmer failed to finish Sunday’s 31-14 victory over St Louis Rams after his left leg buckled during the fourth quarter.

Further examination revealed a torn anterior cruciate, and Drew Stanton is now in line to step in as the Cardinals aim to build on their 8-1 start.

Stanton won two of three games earlier in the season when Palmer was out with shoulder trouble, and the stand-in inspired Sunday’s turnaround against the Rams, throwing for two touchdowns.

But Palmer has also been in good form, completing 63% of his passes for 1,626 yards and 11 touchdowns against three interceptions this season.

Those figures helped earn him a three-year contract extension earlier this month.