The Red Sox just paid an enormous amount of money for the baseball-throwing services of David Price. The deal makes sense, as Boston struggled last year in that department, and now they’ve basically ensured, barring injury or anomalous performance, that they’ll struggle less in that department next season. Price is a an exceptional pitcher. That was a well-established fact before he was handed $30 million a year — dating back to his breakout 2010 campaign with the Rays, in fact. However, this past season provided glimpses at a repertoire that might facilitate the next stage of David Price, Pitcher, and it was centered around the use of his cutter and the improvement of his changeup.
Jeff went over the changes in Price’s cutter usage in late September, but the main premise is this: Price started throwing more cutters, throwing them harder, and locating them further inside to right-handed hitters toward the end of last season. As we’ll see, that impacted how successful his changeup was in different parts of the zone.
Now, the changeup: we often hear about how difficult they’re to learn. They’re a “feel” pitch, and we’re told that, because of that, they need a lot of work — work that usually comes from experience. It takes confidence to throw any type of pitch well, and when confidence is lacking in a particular offering, the pitcher is reluctant to throw it very often. This is a little different for left-handed pitchers: as Eno pointed out in this piece, left-handed starters throw changeups 65% more often than right-handers do. Lefties inherently have a difficult job because the majority of hitters are right-handed; to combat this, they throw more changeups, the pitch with the best reverse platoon split.
Price has always thrown a changeup, going back to his debut in the league. And, fitting the narrative that changeups are found with more experience, he’s thrown them with increased usage every season of his career. Take a look at his pitch usage every season since 2010:

David Price Pitch Usage — 2010-15
| 2010 |
56.8% |
17.5% |
– |
3.4% |
15.6% |
6.6% |
| 2011 |
36.7% |
34.1% |
– |
8.4% |
9.3% |
11.1% |
| 2012 |
25.2% |
35.8% |
9.7% |
7.0% |
11.2% |
10.9% |
| 2013 |
19.6% |
33.7% |
17.7% |
0.6% |
11.5% |
16.9% |
| 2014 |
17.1% |
39.6% |
13.8% |
– |
9.5% |
20.0% |
| 2015 |
32.2% |
22.1% |
14.9% |
– |
8.1% |
22.4% |
SOURCE: FanGraphs
In 2015, he cracked the 20% mark with his changeup usage, and he’s now transitioned firmly away from using his curveball as his main secondary pitch. In truth, he had already transitioned away from that approach beginning in 2013, but this year marked not only another increase in usage, but a few other adjustments that merit attention from us.
Read the rest of this entry »