Rojas should stay in the minors until he can prove that he can throw strikes. You can't have a pitcher who consistently walks at least a hitter per inning and be successful.
Twins will be swept by the Yankees just like the Dodgers. Those teams have good bullpens we don't. Also, Tristan Gray is not a big league player, way too many strikeouts!
The Twins bullpen is amazing at how consistently horrible they are. Every out is very difficult and they have to develop relievers that don't walk people all of the time.