The starter's future is unknown, as every future is unknown, but the pattern of success (a shutout!) skews likelihood in his favor, relative to his untested peers. With every successful batter, that skews more. Continuing to commit to your starter until actual indications of failure present themselves does not have to be done one inning at a time (by which time relieving him may be a moot point), but you can commit to him one out at a time, one batter, one pitch. Keep and eye on him, keep relievers warmed and ready, but don't pull him because of some idea that the eighth inning is somebody else's job, or some baseless notion that the human arm is decimally programmed to weaken after 100 pitches. I concur that lifting him for a pinch-hitter has an arguable benefit. I'd argue against that, and I'd certainly support Baxter's bat instead. But that's second guessing. I wanted Niese to hit. But I guess I knew he wouldn't, so I'll drop out.