MASH Report: Predicting Pitcher Injuries
A few years back I created a metric to help find pitchers who are showing signs of a possible injury. I named the metric PAIN (Pitcher Abuse INdex). While I can easily publish the information at all times, I have not been able to dive into the results as often as I would like. With the new arrangement with BJ Maack and me with the MASH Report, he will be looking at more of the daily and rehab updates and I can then dive into some deeper topics. Today, I will give an update on possible pitcher injuries.
There are just two inputs into the PAIN metric, fastball velocity, and Zone%. I have found drops in both to be indicators of possible pitcher injuries, so I decided to include the pair in the metric. Initially, I had to do a little back fitting to get the system to work. I have made a few minor tweaks over the years, but it has remained relatively constant.
One of the more recent tweaks I have made is to lower the bar for the players at risk. Initially, I made 100 the threshold for risk, but looking back, values of 90 are injured quite often. At some point in the future, I may adjust the formula so 100 is the threshold again.