The Mockingbird

A Gentle Massage

with 8 comments

To follow up on my article at the Hardball Times, here’s another look at the strike zone- this time taking it pitcher by pitcher (hitters come next). When I started crunching all this data I thought that this would be much more interesting than just looking at the quirks from umpire to umpire, and go towards proving (and/or quantifying) another widely held baseball assumption- that umpires tend to give the best hitters and pitchers favourable calls.

However, it’s not that easy to draw conclusions this time because there are many factors (what hand he throws with, how hard and with what movement, even how much deception is in a pitchers delivery) that could affect the data and one year of (incomplete) data isn’t really enough to go on. I’m pretty confident that the umpire results are accurate because most of them are using 2000+ calls. But for pitchers the average number of calls available is 500, and there’s likely to be a lot of variance in them since they’re dealing with a few umpires each (who we now know can be drastically biased one way or the other) rather than a random sampling of players from the entire league.

It seems plausible that Cy Young types would dominate the top of the rankings based on reputation alone (and rookie pitchers would have to earn respect) but that’s not the case. The following table shows the top and bottom 10 pitchers in terms (here is the complete list) of how many extra strikes they got per game. The only thing I’ve changed is the Strikes Above Average (SAA) rate is now expressed in terms of extra strikes per 75 pitches, because that’s roughly how many a ump makes for a pitcher over 9 innings. So these numbers are are +/- of how many favourable calls these pitchers got per game last season, according to pitch f/x:

Bottom SAA Top SAA
Name SAA Name SAA
Derek Lowe 6.26 Frank Francisco -5.90
Jeremy Accardo 5.24 Gavin Floyd -5.23
Joe Beimel 5.31 Brandon Morrow -5.07
Roy Halladay 4.14 Randy Wolf -4.90
Tony Armas 3.93 Kameron Loe -4.50
Bronson Arroyo 3.87 Ryan Feierabend -4.39
Cole Hamels 3.70 Vincente Padilla -4.29
Josh Towers 3.60 Joaquin Benoit -4.10
Yovani Gallardo 3.58 Jamey Wright -4.05
Joe Kennedy 3.32 Jon Lester -3.98


The only thing that really jumps out from for me is that there are three blue Jays in the top 10. (Scott Downs was over 7 but just missed the cut for minimum pitches). Perhaps a sign of good framing behind the plate? But in general well-known aces don’t seem to be highly favored- at least not enough to overcome the noise and randomness fluctuation in the data.

Here’s where it gets interesting, though. To see if there was a correlation in the long run between better pitchers and better calls, I graphed the opponent’s batting average against the number of extra strikes per game and ran a trendline. There is none- it’s dead level. That would seem to confirm that the quality of the pitcher on the mount doesn’t matter (or isn’t particularly significant). As is probably blindingly obvious, charting BB/9 against extra strikes BB/9 against extra strikes shows that pitchers who get better calls walk fewer batters.

But here’s the kicker- the same is true for strikeouts: pitchers that receive a higher number of favorable calls strike out fewer batters, not more.


Of course that makes zero sense, so it has to be the other way around. Pitchers who strike out a lot of batters tend to have electric stuff rather than impeccable control, and those kind of pitchers don’t get as many calls going their way. They still manage to strike out far more batters by getting swinging strikes and overpowering hitters down the middle, but it’s pitchers like Tom Glavine, Josh Fogg, Jarrod Washburn and Roy Halladay that are the umpire’s darlings and manage to expand the strike zone, even though they don’t reduce the “ball” zone.

That doesn’t exactly come as a big surprise to anyone who has watched a control artist pick establish the outside corner, but now we know that control has a significant impact on umpires, while a pitcher with superior pitchers may actually have a negative effect. And it can be a significant difference- between the two extremes of Roy Halladay and Roy Oswalt, it comes out to about 7 calls a game, although on average the range is more like 3 or 4.

Written by halejon

November 21, 2007 at 8:56 am

8 Responses

Subscribe to comments with RSS.

  1. The brave souls that officiate professional sports these days have never had it so tough:

    Now I emplore you to expose their shoddy call-making to the best of your ability! The numbers never lie.


    November 23, 2007 at 4:34 pm

  2. […] If you haven’t checked out my article at the Hardball Times, get to it already! The hot stove is already officially cold for the Jays so I’m going to spend the next two months until the sun shines getting my nerd on with the pitch f/x data. If you missed it, here’s my breakdown by pitcher. […]

  3. […] November 21, Jonathan Hale published “A Gentle Massage“, an article investigating whether better pitchers get more strike zone calls in their […]

  4. […] November 21, Jonathan Hale published “A Gentle Massage“, an article investigating whether better pitchers get more strike zone calls in their […]

  5. […] I know, talking about about 1/5 of a run per game is kind of lame when the kid throws 98 on a regular basis and has the kind of offspeed stuff you might name a child after. But it’s interesting that they gave him the benefit of the doubt when most power pitchers tend to get the shaft, while it’s usually guys like the Doc who get the call (more in this old post). […]

  6. […] around the plate, and that maybe due to being a control rather than power guy, Roy Halladay got the best calls in the league of any starter last year, and Saturday was probably par for the course. Tagged with: Blue Jays, Laz Diaz, Roy Halladay, […]

  7. […] Last Season Roy Halladay got the BEST calls of any starter in the league. Which seems to be something that favours control-type pitchers who don’t strike out a lot of batters over guys with electric stuff. Now the Doc is striking out more this year, but he’s still primarily a control pitcher. […]

  8. […] Control pitchers seem to get better calls. […]

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

RSS Recent Posts

Recent Comments

Don’t jump! |… on Hudson + Lester = 4ever
halejon on Blue Jays Blockbuster —…
Happ’s Grasp O… on New Blue Jay J.A. Happ is Over…
The Daily Duce: Tues… on More on the Wind vs. Dickey…
The Daily Duce: Tues… on Does closing the dome help R.A…


RSS bluejays mlb

%d bloggers like this: