The Arizona Cardinals fear that quarterback Carson Palmer suffered a torn ACL in his left knee during Sunday's game against the St. Louis Rams, a source confirmed to ESPN NFL Insider Adam Schefter.

Arizona Cardinals quarterback Carson Palmer suffered a torn ACL in his left knee during Sunday's game against the St. Louis Rams and will be placed on season-ending injured reserve, coach Bruce ...

Arizona Cardinals quarterback Carson Palmer suffered a torn ACL in his left knee during Sunday's game against the St. Louis Rams and will be placed on season-ending injured reserve, coach Bruce ...

Arizona Cardinals quarterback Carson Palmer suffered a torn ACL in his left knee during Sunday's game against the St. Louis Rams and will be placed on season-ending injured reserve, coach Bruce ...