If I never looked at Reyes Moronta’s line, I would think he’s having a worse season than he is. In reality, his numbers have only taken a slight downtick from where they were last year. A 2.89 ERA, 28.6 percent strikeout rate, and 0.64 HR/9 are all very good and basically what he did in his first full season. They’re also a lot better than what I would think if I never got to look at his FanGraphs page until this year.
Relievers aren’t necessarily volatile, but the fact that they pitch so few innings makes them seem that way.