SP Skills Surgers
Though I have no math to back this up, anecdotally (is that a word? the red underline of death is appearing underneath it as I type!) it seems as if pitchers suddenly improve mid-season much more frequently than hitters. In other words, the light bulb goes on and a pitcher’s skills will surge in a hurry. I decided to compare SIERA over the last 30 days with SIERA in April for all starting pitchers (this was originally meant to only include American Leaguers, since I’m the AL SP man, but my mind was apparently elsewhere and I forgot to filter, oops) to see who has enjoyed the biggest declines in the metric. This is a great way to identify RoS breakout candidates by looking beyond just the ERA leaders for the month.

