A look at what has changed and by how much.
A discussion some of the changes we’ve made to DRC+ and DRA, an explanation of how they work, and finally a look at some notable 2021 examples of these statistics in action.
Who should win the NL Cy Young Award in this abridged season, according to the DRA?
How well can a statistic compensate for the loss of more than 100 games in a season?
How accurate are the traditional aging curves we’re familiar with?
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.