In the 1870s, Gus Hornsby spread the game of American football around the world like an evangelist and helped establish it in the U.S. heartland. Hornsby seemed destined for greatness as a journalist, inventor, explorer and entrepreneur. His arrogance, greed and an intractable gambling addiction, however, drove him to criminality and cast him into obscurity. But this public ruin led to his greatest accomplishment in prison: personal redemption. Surprisingly,...