I'll always be curious just how good of a starter Osuna may have become, but at this point it would almost be a foolish move. He's one of our most valuable players in his current role, and we don't have a need for starters. That's without even getting into Osuna's past arm issues.
He's our closer from here on out and I don't know if we've ever had one who was this good right out of the gate (sorry Billy Koch).
Our pitching staff doesn't need much in the way of tweaking this off season. Try and add a quality reliever or two, no need for a bold move like this.