Morris burst on the scene as a rookie in 2012 as a quick, one-cut back who flourished in a zone rushing scheme. The attention on quarterback Robert Griffin III during Morris' first two seasons opened up huge holes.
The last two years, however, Morris has looked slow -- a product of a heavy workload (1,078 carries in four season) -- and he struggled to break tackles at the second level.
Morris is in a position to eat away early down snaps from McFadden. Newly re-signed Lance Dunbar will take the pass catching role out of the backfield.
The addition of Morris shouldn't preclude the Cowboys from adding rusher in NFL draft, especially in the mid rounds where the cheap value lives.