When your good,your good.

Most players who aren't at their best, well, they find a way to stink. But Mark Prior is so good that when he is less than his best, he's still hard to beat.

That is the sign of a truely great pitcher. Randy Johnson, Curt Schilling, Pedro Martinez, Jason Schmidt, Roger Clemens, all have that ability to pitch a good game when they dont have their best stuff, and Mark Prior can be added to that list as well.