Tuesday, November 22, 2011

2011 in Review: Relief Pitcher Vertical Vector Charts



Click to enlarge
Continuing with the vector charts series that I started earlier today (based on this from Athletics Nation) here are the relief pitchers stats visualized awesomely.

If you need a refresher here is how to look at the graph:

Each line corresponds to a Giants relief pitcher. The angle of each vector corresponds to the pitcher's GB percent with 100 percent ground balls as a horizontal line and 100 percent fly balls the opposite (duh) and represented as a vertical line, and the middle between the two extremes (50 percent ground ball rate) represented as a 45° angle.

The length of the line corresponds to the pitchers FIP-, where 100 is equal to league average and each point below is equal to a percent better than league average. So an FIP- of 75 means that the pitcher FIP was 25 percent better than league average. So in this chart a shorter line means that the pitcher pitched better which is kind of counter intuitive for how we would normally look at things.

Sergio Romo is the tiny, tiny line which is pretty amazing. The rest of the Giants relievers come in around 80 which is still really good and finally there are the two outliers Steve Edlefsen and Barry Zito but neither pitcher pitched many innings in relief so it didn't kill the Giants bullpen much.

Unlike the starting pitchers the relievers are not as fly ball heavy with 7 guys who were at the 50 percent mark or higher for ground balls with just Romo being the only guy who would be considered an extreme fly ball pitcher.

Up next will be the Giants hitters.

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