Call Kelly into his office (he is Kelly's boss) and ask him whether that meathead agent of his has had any contact with NFL teams.
I'd expect an honest answer if I were Swarbrick.
If Kelly admits it, then Swarbrick should advise Kelly not to spend any time or University resources from now until the bowl game in pursuit of those opportunities.
And then Swarbrick should fire him the same way he fired Michigan - by handing Kelly an envelope with a note handwritten in crayon at the final gun in Nashville. "You are terminated for cause effective immediately. Find your own way home. We'll send you your stuff in a box, COD."