Originally Posted by Brutus
Yes we do. It's still predictive. The correlation has shown that through research. It's just not quite as much a tight standard error as non-knuckleball pitchers.
It's akin to comparing batting average to on-base percentage when stacking up against run scoring. They both correlate pretty well to run scoring. One correlates better than another, though.
And we know that even with "normal pitchers" it is predictive, but not definitive. With so few knuckleballers, the error bars are even higher. Toss in that I don't know that we have ever had a knuckleballer who throws as hard as Dickey does and we are working on an entirely different level. So no, we don't really know if he is outperforming his "FIP" or not. You are making some awful large assumptions on an already presumptuous theory.