Donte Stallworth was on his morning commute last month, a five-block morning ritual in this attempt at a new life, when he walked past the White House’s north lawn. He smiled as he recalled an old memory. Back in his old life — way, way back — when he was a football player, he and his University of Tennessee teammates were national champions and guests at the White House. Stallworth, a talented freshman wide receiver, hadn’t played that 1998 season, sitting out as a redshirt, but he joined his team anyway as it presented President Bill Clinton and Vice President...