I mean I love Pirlo, but yeah.This is so insane.
The defensive responsibilities are so different between a RB and a DMid. The RB needs to be able to defend more in tight spaces and 1v1. What makes Ring so effective is his ability to read the play in front of him and break it up in space. He would lose that ability as a RB completely.
Actually there are a number of examples of RBs who made great DMs (Lahm, Iraola at our level), or former DMs who became RBs (Zabaleta), but I just think this is a ridiculous usage of Ring.