During World War II, the National Football League faced a crisis unimaginable today: a shortage of players. By 1943, so many players were in the armed forces that the league was forced to fold one team (the Cleveland Rams) and merge two others: the Pittsburgh Steelers and the Philadelphia Eagles. Thus were the Steagles born. The Steagles included military draft rejects, aging stars lured out of retirement, and even a couple of active servicemen who...