Since 1970, only 13 first round rookies have recorded 70% of all running back carries by their team. Two of those players were Richardson and Tampa Bay’s
Doug Martin last year. Of that group, Richardson did post the lowest YPC average, but he was within 0.1 YPC of
LaDainian Tomlinson. The next two lowest averages belong to
Robert Edwards and
Emmitt Smith; the former suffered a career-debilitating injury in a beach football game after his rookie season, while the latter ran for the most yards in NFL history.