Keep in mind the main reason Dickey is so effective is due to his velocity. He doesn't throw a standard knuckle ball. His knuckleball sits around 77 mph, and is his ko pitch. If that velocity, which was the highest of his career, dips he could be in trouble. Especially in a hitters park like Miller Park. Not saying he can't keep throwing it long term, but he isn't the typical rubber arm knuckleballer.