We’re about 40 games into the 2019 MLB season, and while that may not be a huge sample size, it’s not too early to begin identifying starting pitchers who may be due for some regression. In this piece, we’ll be looking at starting pitchers (who have a “qualified” number of batters faced) with the largest differences between their ERA & SIERA.
If you aren’t familiar with SIERA, MLB.com defines it as the following:
SIERA helps us see what the future might hold for a pitcher instead of focusing too much on the results of their past starts.
Here are the 10 pitchers with the biggest differences between their SIERA & ERA.
Keep in mind this doesn’t mean all these guys will get punished or regress in their next start. This is just something you want to be aware of and take in account when attempting to project how a pitcher will fare the rest of the season.