Williams brings a different skill set than the other RBs on the roster so it'll be interesting to see if he can parlay that into a role for himself in the offense. He didn't return punts in college so if he's going to make it as a specialist he's probably going to have to show that he can do that too.
Some background on Trail:
http://mmqb.si.com/2015/02/25/lynden-trail-nfl-draft/#