SIERA is an ERA estimator that holds pitchers accountable for the types of batted balls they allow; SIERA relies heavily on a pitcher's strikeout%2C walk and ground-ball rates ...

When the 2009 season started, it looked like the Yankees would run away with the AL East with their lineup of hitters and pitchers. Now, with the season nearly an eighth of the way through, Alex ...

The correlation between ERA and UERA was 0.36 — not overwhelming, but pretty strong. That means that pitchers who are good at preventing earned runs are also generally good at preventing unearned runs ...