Cardinals believe Carson Palmer has torn ACL

getty images

getty images

Just days after signing a $50 million contract extension with the Arizona Cardinals, quarterback Carson Palmer is believed to have torn his ACL.

After missing time earlier this season with nerve issue in his throwing shoulder, Palmer returned to the field and had been a big part of the teams offense and their 8-1 start.

However on Sunday the season appeared to come to an end for Palmer who went down with a knee injury during the fourth quarter against St. Louis.

Palmer will undergo an MRI and the Cardinals will provide an update on Monday.