A pitcher doesn't throw a shutout, or a no-hitter, all by himself. Fielders must make the plays behind him. And the catcher has to hold on to the third strike. I don't believe that Schaefer correlates perfectly with what we'd consider dominant performances. For example, the most dominant thing that a pitcher could do is strike out all 27 batters in a perfect game. But for Schaefer purposes I'd award a pitcher more points if he pitched a perfect game where every batter popped out to that pitcher.