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Cole Hamels’ Cut Fastball

Posted By Bill Baer On October 20, 2010 @ 11:25 am In 2010 Playoffs,MLB,Philadelphia Phillies,Sabermetrics | 16 Comments

Using the Baseball Analytics data, I went and looked at Cole Hamels‘ cut fastballs. Earlier in the season, fans weren’t too thrilled with it since it seemed like right-handed batters were killing it and Hamels didn’t know how to use it effectively.

Here’s a look at Hamels’ cutters against right-handed hitters from April through the end of June:

And Hamels’ cutters against RH from July through his last start in the NLCS:

Obviously, huge changes in results. In the second half, the cutter was put in play 23 times:

  • 11 ground balls
  • 8 fly balls
  • 3 pop-ups
  • 1 line drive

Of the 23 balls in play, only four were hits.

When Hamels was learning the cutter, it was thought of as nothing more than a show-me pitch. With dedication to improvement, Hamels has developed it into a legitimate out-inducer — likely why his K/9 went from 8.8 in the first half to 9.5 in the second half. He is no longer a predictable two-trick pony.

Hamels struggled yesterday in Game Three of the NLCS against the Giants, but it wasn’t because of his cutter; it was his four-seam fastball to right-handed hitters.

In 2010, when Hamels threw up and in to right-handed hitters, his wOBA against went from the 71st percentile to the 14th percentile. In the upper-right quadrant inside the strike zone, Hamels dropped to the 6th percentile.

While Hamels made great strides with his cut fastball, it was his bread and butter — the four-seamer — that failed him yesterday.


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