CSS Button No Image Css3Menu.com

Baseball Prospectus home
Click here to log in Click here for forgotten password Click here to subscribe
Strength of Schedule Report
<< Previous Article
Premium Article Transaction Analysis: ... (12/26)
<< Previous Column
Premium Article Pebble Hunting: Search... (12/21)
Next Column >>
Pebble Hunting: How to... (12/28)
Next Article >>
Premium Article Rumor Roundup: Thursda... (12/27)

December 27, 2012

Pebble Hunting

Sean Doolittle and Learning How to Pitch

by Sam Miller

the archives are now free.

All Baseball Prospectus Premium and Fantasy articles more than a year old are now free as a thank you to the entire Internet for making our work possible.

Not a subscriber? Get exclusive content like this delivered hot to your inbox every weekday. Click here for more information on Baseball Prospectus subscriptions or use the buttons to the right to subscribe and get instant access to the best baseball content on the web.

Subscribe for $4.95 per month
Recurring subscription - cancel anytime.

a 33% savings over the monthly price!

Purchase a $39.95 gift subscription
a 33% savings over the monthly price!

Already a subscriber? Click here and use the blue login bar to log in.

Back in June, I wrote about Sean Doolittle in a piece for ESPN the Magazine about position players converting to pitching:

Pitching is supposed to be complicated. It's supposed to take years for a pitcher to learn how to pace himself, to stay healthy, to adjust to batters, to get the feel of touchy secondary pitches. But the modern bullpen doesn't reward finesse and strategy as much anymore; it thrives on heat. Pitchers can enter a game for the seventh, eighth or ninth, blaze a dozen fastballs near the strike zone and never worry about developing a changeup or stamina. In an earlier era, someone like (Kenley) Jansen might have spent years learning secondary pitches. In this one, he pumps fastball after fastball. By the time hitters catch up, he's out of the inning.

Even within the cohort of players I was writing about, Doolittle was an extreme case. At the time I wrote that article, he had been pitching for less than a year. He had a total of 26 minor-league innings (50 strikeouts, eight walks, 1.04 ERA) and around seven in the majors (14 strikeouts, two walks, 5.14 ERA). If pitching in relief is simpler than it’s ever been, it couldn’t possibly be so simple that Doolittle had nothing to learn. It would be completely reasonable to think that the Doolittle who finished the season with 73 innings as a pro would pitch a bit differently than the one who began the season with one inning as a pro. So let’s see what he learned in his first full year of pitching.

Hypothesis no. 1: He would throw more breaking pitches.
The simplest stereotype about pitchers-not-throwers is that pitchers-not-throwers are able to make lots of pitches move in lots of different directions; and, furthermore, are able to throw those pitches in a variety of situations and counts, ruining the hitter’s balance and giving the pitcher a bit of sneakability. Doolittle entered the big leagues with a fastball, a hint of a changeup, and a breaking ball that “started as a slider, but (is) starting to look more like a curveball.” In his first appearance, against Texas, Doolittle threw 21 pitches; every single one was a four-seam fastball. He got 14 targets low and away and seven low and in, but he rarely came close to his target anyway.  

He couldn’t possibly throw fewer breaking pitches after that, of course. But, overall, as the season went on, he actually leaned a bit more heavily on his fastball.

  • June: 85 percent fastballs
  • July: 89 percent
  • August: 87 percent
  • September: 89 percent
  • Postseason: 92 percent

He never attempted to pitch backward in any sort of way. When he was behind in the count in June, he threw a fastball 88 percent of the time. When he was behind in the count after June, he threw a fastball 95 percent of the time. (All on 1-0, in the latter case. On 2-0, 2-1, 3-0, 3-1, and 3-2 counts, he threw 70 fastballs in 70 pitches.)

And he got even less likely to throw an off-speed pitch to steal a strike early in the count. On the first pitch, he threw 77 percent fastballs in June. After June: 92 percent first-pitch fastballs. In one stretch that began in September, he threw threw a first-pitch fastball to 46 consecutive batters. Thirty-eight of those 46 were strikes, which is 82 percent. The league-average on first-pitch strikes is about 60 percent. (Ten were put in play, three for hits.)

Hypothesis no. 2: He would throw more changeups.
Because the changeup is a feel pitch, the sort of pitch that comes with experience and that especially rewards a pitcher who can formulate a plan. Doolittle sprinkled in a few changeups in June, and a few more in July, but never went further with it. Here are his rates against right-handers only, because he throws it against right-handers only—not one against a lefty all year:

  • June: 4 percent
  • July: 10 percent
  • August: 6 percent
  • September: 4 percent
  • Postseason: no changeups

There’s some value to having the pitch in his pocket and keeping it in batters’ minds, but it wasn’t effective on its own, as around 60 percent of the changeups he threw were balls, and just 3 percent induced a swinging strike.

Doolittle did do some things differently as the year went on. His velocity improved, from a bit below 94 to a bit above, on average. His command seems to be improved; he still misses plenty, and gets swinging strikes even when he misses all the way on the wrong side of his target, but he's not (in the half-dozen games I watched for this) missing as often. His breaking ball also got a bit harder, and the slider that started to look like a curve has gone back to looking like a slider. Here’s his first swinging strike on the pitch this year:

And here’s his last, nearly four mph harder:

And here’s another one in September, nearly nine mph harder than that first one:

And Doolittle has gotten the pumped-up reliever thing going now:

But what made Doolittle so fun at the beginning was how absurdly simple he demonstrated pitching to be. And what makes him so fun now is that, if anything, he has gotten even simpler. There might not be a learning process for him, as long as his fastball is as unhittable as it has been. This might just be how Sean Doolittle is always going to pitch.

Sam Miller is an author of Baseball Prospectus. 
Click here to see Sam's other articles. You can contact Sam by clicking here

Related Content:  Sean Doolittle

4 comments have been left for this article.

<< Previous Article
Premium Article Transaction Analysis: ... (12/26)
<< Previous Column
Premium Article Pebble Hunting: Search... (12/21)
Next Column >>
Pebble Hunting: How to... (12/28)
Next Article >>
Premium Article Rumor Roundup: Thursda... (12/27)

Cold Takes: The Politics of Big Sexy
BP South Side
BP Wrigleyville
What You Need to Know: Judge Rules Against T...
Short Relief: Home Runs and Runs Home
Premium Article Baseball Therapy: Confessions of a Fake Mana...
Flu-Like Symptoms: The Vanishing ERA Qualifi...

Premium Article Overthinking It: Bourn to Be ... What?
Premium Article Overthinking It: Handicapping the Injury-Pro...
Premium Article Transaction Analysis: Count on One Hanrahan
Premium Article On the Beat: Remaking the Red Sox
Skewed Left: An After-Christmas Acrostic
Premium Article Rumor Roundup: Thursday, December 27

2012-12-28 - Pebble Hunting: How to Pitch
2012-12-28 - BP Daily Podcast: Effectively Wild Episode 1...
2012-12-28 - BP Unfiltered: The Second-Hardest Ball Hit O...
2012-12-27 - Premium Article Pebble Hunting: Sean Doolittle and Learning ...
2012-12-27 - BP Daily Podcast: Effectively Wild Episode 1...
2012-12-21 - Premium Article Pebble Hunting: Searching for the Worst Game...
2012-12-21 - BP Daily Podcast: Effectively Wild Episode 1...

2013-01-04 - Pebble Hunting: The Saddest Age-27 Seasons o...
2013-01-02 - Pebble Hunting: The Non-Pitching Value of Pi...
2012-12-28 - Pebble Hunting: How to Pitch
2012-12-27 - Premium Article Pebble Hunting: Sean Doolittle and Learning ...
2012-12-21 - Premium Article Pebble Hunting: Searching for the Worst Game...
2012-12-07 - Premium Article Pebble Hunting: Hottest Rumors From Baseball...
2012-12-03 - Pebble Hunting: A Hall of Fame Brochure for ...