I’ll now answer my own question. Even though these three players are theoretically equivalent from a run differential standpoint, I would not want the player who’s -10 on defense. That’s because I believe that poor defense bothers pitchers, causes them to try to do too much, and demoralizes them. So maybe the fielder isn’t “responsible” in a WAR calculation when the rattled pitcher serves up gopher ball or walks the next guy after a poor defensive play, but there’s cause and effect there IMO. So, give me someone who plays at least decent defense. And, I think the Orioles feel the same way.