Why would you draft a RB at 4th when you already have a 5th pick ROY RB on the roster.
Because what we have is an often-injured one-dimensional rb that lacks breakaway speed, and is a liability as both a pass receiver and pass protector.
At the same time, if the team knew that they weren't likely to have Rice stick around, they had noone at defensive end. The problem is that Adams isn't producing, but if the team felt that he could be an elite pass-rusher (and go back and watch Kiffin's press conference, it's clear that they did), it was a logical move to make. Even if they hadn't liked Adams, it would have made good sense to go with Okoye over AD, as we basically had absolutely nothing at that position also.