Yards per Carry+ (or YPC+): Measures to what degree a running back exceeds or falls short of the per-carry output of the collective other running backs on his team. Serves as an overview of team-relative rushing performance. As with following team-relative efficiency metrics, allows for cross-situational comparisons between running back performance on a per-carry basis in the same way that market share stats do for production. For running backs drafted since 2007, the average is 0.54. Chunk Rate+ (or CR+): Measures how often a running back gains at least 10 yards on his carries, minus the rate at which the collective other running backs on his team gain at least 10 yards on their carries. Indicates how successful a running back has been in navigating the first levels of the defense and reaching the secondary, relative to the offensive environment he operates in. For running backs drafted since 2007, the average is 1.07%. Breakaway Conversion Rate (or BCR): Measures how often a runnin
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