Jake Peavy: Jake didn’t have his best stuff tonight, it seemed like he had trouble locating his slider and it didn’t have the usual bite. He had trouble with his slider in his last start as well, I mentioned in the Game Notes that I suspect arm problems and tonight did nothing to dispel that. Jake still pitched well but there was some talk that Kuo was getting all the calls while Jake wasn’t. Let’s look at the charts:
Jake Peavy
Green = ball
Red = called strike
That’s pretty ugly but it’s not actually as bad as I thought it would be. You can see where Jake was trying to hit that outside edge to lefties and just not getting it. On the right hand side there’s a few borderline pitches that were called balls but nothing egregious. Mostly what I see is inconsistency from the umpire.
Hong-Chih Kuo

Not surprisingly we see that Kuo’s pitches aren’t as tightly bunched. We also see the same inconsistency on the left side of the zone. Note: For some reason Gameday didn’t register all of Kuo’s pitches. We’re missing 8 balls and 4 strikes. Based on what we see here I’d say both pitchers were affected equally but Kuo was a little more effective in hitting the edge of the zone.
Back to Peavy. Take a look at his velocity vs. movement chart.
Red = Tonight
Blue = 5/27, the last time Jake looked right
Vertical axis is MPH, horizontal axis is what Gameday calls “break length”*:

The velocity is about the same but the movement is way down on all pitches. Again, I’m worried about Jake’s elbow. That slider he throws has to put a lot of torque on the elbow and it could be taking it’s toll.
* Defined as the measurement of the greatest distance between the trajectory of the pitch at any point between the release point and the front of home plate, and the straight line path from the release point and the front of home plate. - Gameday Blog
3 responses so far ↓
1 Daniel // Jun 7, 2007 at 10:46 pm
For Balls/Strikes graphs, it might be helpful to see the location as a ratio to the height and width of the strike zone for each batter
2 LynchMob // Jun 7, 2007 at 11:19 pm
Can you show us the data for the last pitch?
3 Ben B. // Jun 8, 2007 at 1:24 am
That last graph is really interesting. Thanks for that.
I have a general question about Peavy’s pitching: once or twice a game he’ll drop his arm angle down to throw a pitch. Is it possible for you to track the location of these pitches and the result from them? My subjective impression of it is that dropping down almost never works for Peavy. Come to think of it, I don’t think I’ve seen it work for other pitchers who drop down for a couple of pitches.
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