Changing Fastballs (4/18/19)
After going over the pitchers who changed their velocity from 2018 to 2019, the pitchers who have seen changes this year get highlighted today. For the first week or so, pitchers who saw major adjustments were in the crosshairs of the fantasy community. But who from that list kept the changes? A pitcher’s talent shouldn’t get anchored to one early-season report. It’s time to dive in.
About the data
- I use the fastball’s average spin rate and velocity along with the pitcher’s overall Zone% to come up in the Injury metric. With spin rate, I’ve seen pitchers try to keep up their velocity while dealing with an injury and the pitch’s spin changes. As for Zone%, if a pitcher is having issues finding the plate, they may have something mechanically wrong.
- The Injury value ranges from a -100 (several negative forces are at work) to +100 (major improvements).
- A pitcher can have more than one fastball in the table
- When examining the 2019 data, I’m comparing velocities from the past week to fastballs thrown before this past week.
- All the numbers are available in this overall spreadsheet.