Measuring the impact of knuckleballers’ BIP propensities
So how about knuckleballers? Do they throw balls that, when hit, are easier to field? This is often claimed. Their BIP_RBARb seems to support this position. BIP_RBARb stands for “balls-in-play runs below average,” with b denoting “beta”—because construction of this metric is expected to be refined and improved. A pitcher’s BIP_RBAb measures the impact of […]