Pittsburgh's running back room has two settled spots at the top Jaylen Warren and Rico Dowdle and one genuinely open competition behind them. Kaleb Johnson enters his second season as the presumptive favorite for that third job, but a disappointing rookie year has left the door open for veteran special-teamer Travis Homer and hometown rookie Eli Heidenreich to make a real push. Strip the competition down to what each player did in his final college season, and Johnsons case i