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« Yankees' Season May Ride on Burnett's Fastball | Main | Marcum, Collmenter Soft-Tossing Clones »
Tuesday
Oct042011

Comparing strike zones for Sabathia and Verlander

During last night's ALDS Game Three between the New York Yankees and Detroit Tigers, Yankee manager Joe Girardi mentioned during his in-game interview that he thought CC Sabathia wasn't getting some borderline calls from home plate umpire Gerry Davis.  He also brought it up in the post-game interview saying of CC, “I actually thought he made a lot of good pitches tonight and I thought the zone was a small zone.”

So was CC getting squeezed? Was Justin Verlander getting a better strike zone to work with?  Or both?

Let’s take a look at some of the numbers and heat maps.

(Click image to enlarge)

The most noticeable difference here is the strikes Gerry Davis was calling for Verlander off the outside edge to lefty hitters.  Verlander also benefitted from a few strikes that were a bit high.  However, it's tough to say whether CC would have gotten any similar calls in that area since he didn't throw anything there that was taken by any Detroit hitters. The up and away strike to RHB also seems to have tipped in Verlander's favor, while CC was getting the low and away area.

So what do the numbers say?

Game 3 - Gerry Davis Strike Zone
Strike Zone Called BallsOut of Strike Zone Called Strikes
Sabathia63
Verlander510
Called Strike% In Strike ZoneCalled Strike% Out of Strike Zone
Sabathia62.5%7.3%
Verlander70.6%19.6%

So what does this tell us? Essentially, CC and Verlander missed out on about the same number of called strikes in the strike zone. However, Verlander greatly benefited from an expanded zone, getting more than three times as many called strikes on pitches outside of the PitchFX defined strike zone. Most of those pitches are likely the outside strikes to lefties you see in the above heat maps.

As for the percentages, CC was getting fewer strikes called overall in the strike zone. A 62.5% strike zone called strike rate is pretty low. During the regular season, Gerry Davis correctly called 76.8% of strikes in the strike zone, and 78.9% for left-handed pitchers. For whatever reason, he simply was not giving CC much of a zone to work with yesterday.

Granted, we are talking about a total of just 16 taken pitches in the strike zone for CC and 17 for Verlander. If CC was throwing to some borderline spots that Gerry Davis does not normally call while Verlander was not, it could explain the disproportionate results.

However, for strikes called out of the strike zone, it is pretty clear that Verlander was the big beneficiary in last night's game. Three of his strikes called on pitches out of the zone were deciding strike three pitches.

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Reader Comments (1)

I really do appreciate your feedback. I'm still struggling with the technology but I wish everyone all luck with this competition. I've been pinned down with a sick grandchild and today a very sick daughter - both with gastric flu which afflicts us all at this time of year - so this is the first moment I've had to get to the computer hoyoew hoyoew - red bottom.

November 28, 2011 | Unregistered Commenterzlghau zlghau
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