I think everything from the team, both said outright and on background to the beat writers, says that they think what he did last year is real. You don't let that guy go, you bend over backwards to make it work. So if he hadn't gotten the option, I think they would have done whatever gymnastics they could to limit his innings on the big league club (long relief, phantom IL stints, etc.), and then slid him into the rotation for good around midseason. Now with the option, they can limit his innings in a much more straightforward way in the first part of the year, and then call him up once we're deep enough into the year where they can treat him like a normal starter the rest of the way. I do wonder what happens if another starter gets hurt or bombs early in the year. Does he get the call up, and gets sent back down for a breather later in the year? Or do we see some of those aforementioned gymnastics in like August?