Here's a Thought: MLB's 10 Most Effective Curveballs

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Here's a Thought: MLB's 10 Most Effective Curveballs
(Photo by Jed Jacobsohn/Getty Images)

I thought it would be an interesting idea to see who has the most effective curves in the major leagues this year.

I'm measuring curve effectiveness by Pitch Type Linear Weights, which says how many runs a pitcher prevents above average every time he throws 100 pitches.

So, if I say a curve's effectiveness is +1 run, that means that every 100 curves that pitcher throws, he allows one run less than average.

I set two groundrules for this. First of all, pitchers have to have thrown at least 30 innings this year. Second, they have to use the curve at least 10 percent of the time.

For each pitcher, I'll list the average curve velocity, average curve movement relative to an average major league fastball (if you want to know why I'm comparing it to a fastball, just ask), curve usage (how often the pitcher throws the curve), and curve effectiveness (as measured by Pitch Type Linear Weights).

Let's take a look.

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