I guess the question is can someone apply the advanced metrics to help the knuckleball along? The same approach usually argues against the sac bunt, although it is a bit of a self-fulfilling analysis. Players don't bunt enough to make a sacrifice so sure a thing, and that was usually the only thing that made it worthy of consideration. On the other hand, can knuckler use the spin rate analysis to help learn what it does? This would be a fantastic thing to hear about if it happened.