In his career, not just as a closer, Duran has worked more than 1 inning 22 times, covering 41 innings. he has an ERA of 1.10 over those appearances with 54 K's. Thanks to the "Ghost Runner" rule, 5 of the 10 runs he's allowed in multiple inning appearances have been unearned. Not arguing for him to be a starter, just putting numbers out there.