RB4’s have consistently looked good in preseason. This is one of those areas where you can’t always believe and trust what you see in preseason when you are watching guys who are getting cut. Blackshear wont make it and will clear waivers and be on the PS. His ticket to the roster is special teams not RB. Maybe next year he sticks. Duke probably does not make it either.
In general the team puts more value on special teams vs depth at WR, RB, CB etc than the average fan thinks they should. The organization is right.