Under Review Concussions are one of many injuries sustained by professional football players. But unlike those to the arm, knee, or back, concussions and similar head injuries weren’t properly treated for much of the NFL’s history. In fact, those in charge spent years denying the severity of the problem, or that there was even a problem at all. Game Planning Willie Frazier’s career in professional football lasted from 1964-1975. During that time, he played for the Houston Oilers, the San Diego...