Before we go further down the path of finding pitchers with prolonged inactivity and thinking those situations are comparable to Song, bear in mind Noah Song has a career high in IP of SEVENTEEN. Whitlock and anyone else pitched much more.
DD is well aware and certainly should guess that 17 IP in low A ball might not be the best warmup for a full season in MLB. He also can’t bury Song on the IL for half a year, because Song’s biggest flaw is inactivity and you don’t cure that with more inactivity.
If Song shows up topping out at 87mph, he will be sent back and the entire scenario only costs Philly less than one game’s worth of Trea Turner salary. If he is impressive enough for Philly to want him, then notorious prospect unloaded DD should do the smart thing, and trade for Song, allowing him to option Song to the minors. Given its DD (and a freakishly shallow Philly farm system), safe to assume everyone except Andrew Painter and Mick Abel are available…