What good is using Myers as set-up if Gordon is just going to blow games? Sure, Gordon is having his shoulder checked out, as he's apparently had some problems coming out of spring training with it (which would've been nice to know before the season started!), but even a healthy Gordon doesn't fill me w/ confidence.
Ideally, yes, Myers should still be in the starting rotation. But he's not, and he doesn't look to be going back any time soon. Make him the closer.