Ken Whisenhunt never had any doubt. This truth has existed in the NFL for years. "It always starts with the quarterback," the San Diego Chargers' new offensive coordinator said this week -- and he would know. After all, the 2012 season cruelly proved his point. Last year, his Arizona Cardinals never found an answer at the position, ultimately resulting in Whisenhunt's dismissal from the head-coaching post. And at the same time in San Diego, a season of inconsistency and struggle for quarterback Philip Rivers led to the same fate for Rivers' former longtime head coach, Norv Turner.