Multiple trends are apparent.
Jonathan Judge assesses how accurately Statcast seems to be measuring balls in play, and how it has changed over time, in light of the upcoming transition from Trackman to Hawkeye.
Many readers have asked for more detail as to how DRC+ is calculated.
DRC+ reports not only the expected level of contribution for each player, but also how uncertain the DRC system is about that estimate.
What follows is a summary of the updates and a discussion of what we’ve learned.
Why use DRC+? The simple answer is because it’s more accurate.
What the concept of credit being “deserved” really means, and how one might go about determining it.
We continue to scrutinize and update our metrics, and as part of that process we’ve been comparing various offensive metrics to one another.
BAM admits that its “expected” statistics were never designed to predict anything. Does it matter?
DRA is ready to go for 2018, with several prominent innovations.
We want to start disclosing uncertainty. Here’s how we want to calculate it.
One day I sat a dozen feet behind Maddux’s catcher as three Braves pitchers, all in a row, did their throwing sessions side-by-side. Lefty Steve Avery made his catcher’s glove explode with noise from his 95-mph fastball. His curve looked like it broke a foot-and-a-half. He was terrifying. Yet I could barely tell the difference…
Player value depends heavily on your assumptions, and particularly on how you decide to measure and compile a player’s supposed contribution.
DRA, examined through the lens of MLB’s surprising ERA leader.