The father-son relationship is at the heart of America's fascination with football, and it's the starting point for filmmaker Sean Pamphilon in The United States of Football. A seasoned sports journalist, Pamphilon couldn't avoid the mounting evidence that football presents long-term health risks for players. The film revisits the appalling demise of Pittsburgh Steelers stalwarts Mike Webber and Justin Strzelczyk, as well as the early onset dementia experienced by such old-timers as John Mackey, a Hall of Fame tight end who later became president of the NFL Players Association, and Ralph Wenzel, a journeyman lineman who later coached at North Carolina Central University. Much of the testimony will be familiar to those who have been paying attention to reports of concussions, CTE and the grisly trend of football players committing suicide by shooting themselves in the chest. But some of the most compelling passages are the portraits of the near-vegetative Mackey and Wenzel, and their activist wives.