Reynaldo López, Looking Up
Reynaldo López had a bummer of a 2019. Offense is high around the league, but a 5.38 ERA is still terrible. Pitchers don’t adjust for league offense or batted ball luck in their heads; they pretty much know the way the numbers work. Two is otherworldly, three is good, four is average, and five is “what am I doing wrong?” Honestly, it doesn’t even get that much better if you do get fancy; he had a 5.04 FIP and a 5.27 xFIP, so it’s not as though he was just getting unlucky. Those were 8% and 15% worse than league average, respectively — not great.
But wait — López was worth 2.3 WAR last year. That’s not Jacob deGrom or anything, but it’s a totally acceptable number, not at all in line with the string of fives that comprise his runs allowed statistics. Is this just a sign of how bad replacement level pitchers are? Nope! It’s a sign of a quirk in our WAR calculations and a quirk in López’s game.
When we calculate a starting pitcher’s WAR, we use FIP, with one small modification. Infield fly balls are automatic outs, and in our WAR calculations (but not in the FIP numbers we display) we count them as such by treating them as strikeouts. It’s a true enough outcome — infield fly balls pretty much always turn into outs. Grounders, line drives, and other fly balls are all soup, but a popup’s fate is known the moment it’s launched.
López gets a lot of infield fly balls. In 2019, he led the majors with 36. In 2018, another year where he managed 2.3 WAR with a 108 FIP-, he tied Max Scherzer for the major league lead with 38. Outs don’t get much easier than this: