Los Angeles Chargers head coach Jim Harbaugh has been around some great quarterbacks in his coaching career, dating back to his time coaching Andrew Luck at Stanford. Most recently, he coached J.J. McCarthy for three years at Michigan before taking the Chargers job and working with Justin Herbert last year.

The Minnesota Vikings got a Cinderella season from journeyman quarterback Sam Darnold last season, but now it’s time for the new era. After a preseason injury to rookie J.J. McCarthy, Darnold led the Vikings to a 14-3 record.

Carter struggled to develop a strong plan and came with plenty of baggage from his time with the Tennessee Titans at the same position. New York's offensive line was one of the worst in football over the last few years.

The Vikings have made an addition to their coaching staff with the hiring of Keith Carter as assistant offensive line coach.

The Vikings added assistant offensive line coach Keith Carter, who wasn’t necessarily beloved by all of his former players. Head coach Kevin O’Connell hired Carter, coming off two years as the Jets' O-line coach following five years as the Titans' O-line coach,