Arizona Cardinals defensive end Calais Campbell injured his MCL in Sunday's loss to the Broncos in what coach Bruce Arians the "dirtiest play" he'd ever seen. 

By SI Wire
October 05, 2014

Arizona Cardinals defensive end Calais Campbell injured his MCL in Sunday's loss to the Broncos, Cardinals beat reporter Darren Urban tweeted.

Campbell appeared to sustain the injury on a chop block. After the game, Arizona head coach Bruce Arians said it was the "dirtiest play I've seen in 37 years." 

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Kent Somers of AZ Central Sports reports that Campbell is out three to four weeks, which means he would miss games against the Redskins, Raiders and Eagles and possibly the Cowboys game on Nov. 2. 

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