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Diamond Tools: Best Curveballs

A great curveball not only gives a pitcher a strikeout pitch, but it makes his fastball all the more effective. Ask Brandon Webb about that sometime. Inside, ranks the five Arizona Diamondbacks prospects with the best curveballs.

Curveballs can move laterally, vertically, or both.  They can feature a sharp, late bite, or they can rainbow from a hitter's ear to the outside corner of the plate at his ankles.  While it's easy to look at a curveball with a lot of movement and fall in love, the two most important factors when rating a curveball are neither velocity nor movement (though obviously, both of those are... Recommended Stories

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