I spent a decade in press boxes listening to managers argue with umpires, but...

https://blogfreely.net/raymond-cole86/the-numbers-first-athlete-how-modern-data-changed-the-locker-room

I spent a decade in press boxes listening to managers argue with umpires, but the real story was happening in the front office. We went from gut feelings to hard numbers, like seeing deep-ball frequency jump from 23% in 2000 to 97% today