"I think a lot of that, you've got to use the eye test," Arrieta said. "If a guy is rolling then you may extend him a little bit longer and if you have high stress innings, one or multiple, then you kind of reevaulate and go from there. But I think you've got to watch the game and see how it unfolds and if you're cruising then you would obviously like to continue to stay out there, but it's tough to plead your case if you're struggling to stay in the game. So it just depends on how the game unfolds and how things progress, but if I'm rolling I intend to be out there for quite a while."