You know much more about advanced stats than I do, so I have some questions for you. I’m curious how much the run value stats you cited predict future success. I’m also curious if they are more results based like ERA, or if they are more like FIP?
I decided to look at Cannon’s page. In 2024, he was in the 47th percentile in fastball run value. In 2025, he was in the 3rd percentile of fastball run value. So did his fastball get that much worse? Or is there some luck involved there?
I then wanted to look at an elite pitcher. I chose Tarik Skubal. In 2021 (his first full season), he was in the 20th percentile in pitching run value. Then he jumped to 78th in 2022, 93rd in 2023, and 100th in 2024 and 2025. Is that kind of jump after a rookie season extremely rare?