Shapiro is probably sitting there thinking to himself, "I can get decent back-end bullpen guys through any number of avenues. I have a possible mid-to-upper rotation, cost-controlled pitcher with great stuff, I'm going to see what he can become as a starter." His history suggests this, and unless Osuna flat out says he no longer wants to be a starter, I see no reason not to pursue it, at least for a season or two.