Some could say that there is redundancy in the Ravens backfield. The projected top three backs , Justin Forsett, Javorius Allen and Kenneth Dixon all present similar size and skill set. None of them present the physical profile to become long term bell-cows or situational battering rams. That fact alone could be enough to keep Lorenzo Taliaferro, a proven physical runner on the roster.
Kenneth Dixon could become that player despite his lack of size. He is a very violent runner, who puts everything (though it isn't an overwhelming amount) behind his pads.