Sheffield ranged from 41-57 on 2018 lists. Gonsalves in the 90s. Gonsalves misses bats, too: 8.6 K/9 in AAA, over 9 for his MiLB career. You'd have to up the level of the filler. Neither Sheffield nor Gonsalves is much to worry about losing. That's the point. For that matter, if Seattle wanted Romero, I pull the trigger before they can hang up the phone. Honestly, this is a perfect example of the type of trade the Twins should be constantly looking to make, IMO. When a team, for some reason, wants to rid itself of talent (Yelich, Realmuto, Paxton, etc etc etc), help them. You'll miss sometimes, but almost certainly less then you'll miss on the minor leaguers you give up.