Perkins struggled as a starter & then became a dominant closer. Duffey struggled as a starter and now is pitching well so far out of the bullpen. I'd like to see him take over as closer for the Twins at some point this season. If he's the best pitcher in the Twins' bullpen, I think he might be, then he should be used in the highest leverage situations. He was a great closer in college so he should be used to the pressure situations from those days.