Durability issues would certainly be a potential problem, but you're also talking about someone who put up a 3.21 xFIP last year as a starter, has never put up over 3.74 in the big leagues, and has ace stuff. I'll take that over Osuna easily, with the same control. Salazar, Stroman, and Sanchez for the next 3 years also is pretty damn sexy if they stay healthy.