Regressing StatCast: A Fable
This fable is inspired by Eric Hosmer and Dansby Swanson. In my last article, I noticed both improved in some of their StatCast metrics. So, I wondered how much should the values regress? After wasting more time than I’ll admit roaming for the answers, I remembered I already discovered the answers when creating my StatCast projections. Magically the season weightings work out to simply splitting the difference between 2019 and 2020 value. Normally, the most recent season would carry more weight, but with 2020’s limited sample, the two StatCast metrics (launch angle and max exit velocity) carry equal weight. Now, I can continue drudging through life. The end.