Jeff Samardzija PITCHf/x

For those who missed it, Jeff Samardzija made his major league debut for the Cubs against the Marlins yesterday, giving up 1 run in two innings of relief work. Here's a PITCHf/x study of how The Shark fared. This is my first time working with PITCHf/x, so any and all feedback is welcome. I originally was going to work with the data myself, but then I ran across BrooksBaseball.net, which does all the dirty work for you. I promise I'll learn how to do everything from the ground up one day, but just not today.

You can see all the charts and data Brooks Baseball provides here. I'll go over the ones that are easier to understand (for me, at least) below. For all images, click for a larger version.


This chart gives the speed of each of Samardzija's pitches. As you can probably see, he started off almost exclusively with fastballs to get himself adjusted. Then, he alternated fastballs and breaking pitches (sliders and changeups, according the MLB Gameday) over the rest of the appearance.

He was in the 96-98 MPH range with his fastballs, topping out at 99. His breaking balls were all right around 84 MPH. If he can keep that 10+ MPH difference between his fastball and his changeup, he'll be quite effective.


Next, here is a plot of balls and stikes. The blue points, labeled "X", are balls put in play.

As you can see, Samardzija pounded the zone pretty well for most of the outing. The extreme outlier was a pitchout/wild pitch. This graph is from the catcher's point of view, meaning that that pitch was high and outside to the left-handed batter.

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