we don't have a long enough history to say what the Ravens do and don't do with rookie rbs. Jam was fed a lot as a rookie while Ray wasn't. Two different coaches two different ways the high pick rb was used early on. Ftr Jam is the only first rd rb for the Ravens and rice is the only 2nd rd one. That very well may be one reason (along with hc) as to why one got the bulk early on.