On Monday, Cam Newton became the latest quarterback to join the $100 million club. Newton's new deal (five years, worth up to $103M and $60M guranteed) puts him in the upper echelon alongside other well-paid signal-callers, including Aaron Rodgers, Drew Brees, Jay Cutler, Tony Romo and Joe Flacco. Is Newton worth the cash? Are any of the $100M QBs? 

SI.com's John DePetro, Chris Burke and Doug Farrar examine the top-earning quarterbacks to determine which are overpaid and underpaid.

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