Starting Pitcher xFIP Underperformers
Let’s take an All-Star break look at the top five starting pitchers who are most underperforming their xFIP marks. We are still nowhere close to reaching the number of batters faced for ERA to stabilize, as research has found it to be above the 750 PA mark, which represents the high value of the interval tested. As a result, going forward xFIP has much more predictive power.

