Seeing is believing

Introducing the ROBIN metric for grading the guys in the trenches

Updated: August 26, 2009, 7:24 AM ET
By KC Joyner | Special to ESPN The Magazine
Getty ImagesNick Mangold, a Pro Bowler last season, grades out as one of the best offensive linemen in the NFL via KC Joyner's ROBIN metric.

To continue reading this article you must be an Insider