Arizona Cardinals standout rookie cornerback Tyrann Mathieu was carted off with an apparent knee injury and did not return to the game against the St. Louis Rams.
The Cardinals apparently fear that Mathieu suffered a torn ACL. He will have an MRI performed on Monday.
Returning a free kick following a Cardinals safety that made the score 23-3 Cardinals, Mathieu went down in a heap and injured his left knee.
Mathieu tried to run off the field, but his knee buckled and they brought out the cart to take him off the field.
It would be a serious blow if Mathieu is lost in what has been a terrific rookie season to date as the Cardinals are trying to lock down a playoff appearance at 8-5.
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