Reviewing the New York Jets' 2015 season, position-by-position:
Position: Offensive line
Overall grade: B-
Individual grades: James Carpenter B+, Nick Mangold B, D'Brickashaw Ferguson C+, Brian Winters C, Breno Giacomini C, Willie Colon C, Wesley Johnson C-, Brent Qvale C-, Ben Ijalana Incomplete.
Key number: 1 -- number of sacks allowed in the red zone.