No. 9: Cardinals' Calais Campbell

Calais Campbell of the Arizona Cardinals ranks as No. 9 in our positional rankings of the NFL's best interior linemen. 
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Campbell has been so good for so long, it’s easy to take him for granted. But he had another excellent season in 2015, playing a lot of one-gap tackle in Cardinals defensive coordinator James Bettcher’s aggressive fronts. Campbell can line up with equal effectiveness right over center, as a one-gap nose tackle, or as a three-tech tackle or five-tech end. While he may not have the raw speed he once did, he’s great at understanding gaps and knowing when to shoot through and when to use his power. With Chandler Jones now on board as the edge rusher the Cardinals have needed for some time, Campbell should be able to make even more of an interior impact in 2016.