Next season probably doesn't matter bc the kid probably won't be playing anyway, and next year we are loaded at OLB too (though safety is as thin as it gets). But it sounds like Kelly is the type to make moves like the one you suggest. If you read his quotes on recruiting from one of his follow up interviews, he says he looks at 3 kinds of players when he recruits - skill (QB, WR, CB), bigs (OL,DL), and big/skills (RB, LB, S) (I'm paraphrasing here and I inserted the positions that go into each group - he did not actually say which positions go into each group). Roberson would fall into the big/skills group, and it sounds to me like Kelly will play any kid in that group where ever he is (1) needed or (2) Kelly thinks he can play at a high level. So if Roberson gets on campus, Kelly sees that he's just an incredible athlete who has the football instincts to play anywhere, and there is a hole in the depth chart 1-2 years out at a position other than RB/FB, he may very well switch the kid.