How Julio Urías Avoids the Long Ball

A fact: Among the 157 pitchers with a minimum of 400 innings pitched since 2016, Dodgers southpaw Julio Urías has the lowest home run per fly ball rate (HR/FB) at 8.4%. The distance between him and second-place Brad Keller (10.1%) is the same as the distance between Keller and 20th-place Rich Hill (11.8%). It’s no wonder that Urías has been terrific so far in his career – he’s controlled the contact he allows like no other.
Also a fact: The reason why xFIP still holds up as a decent ERA estimator is because most pitchers, regardless of their talent level, tend to drift towards a league-average HR/FB rate. Yet here’s Urías, resisting the inevitable pull of regression before our very eyes. Does he have a secret? Or is he merely running from the grim reaper, time ticking with each step? I’m still not sure! But if you’ll allow, here are a few educated guesses that hopefully make sense.
First things first, I need to address a common possibility. As Jeff Zimmerman demonstrated years ago, pitchers with higher fly ball rates also have lower HR/FB rates. That’s because they also get their fair share of popups, so the denominator ends up outpacing the numerator. But even though Urías isn’t a groundball pitcher, he isn’t a notable fly ball pitcher, either. He’s 37th among the aforementioned 157 in terms of fly ball rate – above-average, sure, but not extreme enough to explain his deflated career HR/FB mark. Our answers, if any, lie elsewhere. Read the rest of this entry »





