Archive for Starting Pitchers

The Sleeper and the Bust Episode: 629 – Fireside Chat: SPs Outside the Top 50

1/14/19

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SPs We Like Outside the Top 50:

  • NFBC ADP (set to 12/25/18 for the start date to follow along)

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Pitch Type Performance: 2018 Summary

Shortly after the onset of last season, I dug into pitch-level statistics to see how much swinging strike rate (SwStr%), ground ball rate (GB%), and isolated power (ISO) varied by pitch type. I felt inspired after analyzing Madison Bumgarner before the 2018 season and noticed his fastball, once elite, was utterly broken after his dirt bike accident. (See his 2018 player caption and this July post in which I followed up MadBum’s lack of progress.) I felt encouraged by the praise the post received from readers and fellow analysts alike for the clarity it provided. I’d like to think it helped move the needle, even if only slightly, in terms of how we evaluate pitchers.

I wanted to refresh the guts of that post for the 2018 season with additional metrics. There’s not much else to discuss; this’ll be short and sweet. (I’ll toss in some gratuitous high-level analysis following these tables.)

Notes:

  • All data is courtesy of PITCHf/x via Baseball Prospectus
  • All tables present average rates for starting pitchers only
  • Due to pitch tracking/stringing not being perfectly precise, the numbers below are highly accurate but not completely so and may not align exactly with FanGraphs’ batted ball data (for example, Baseball Info Solution strings far fewer line drives than does PITCHf/x)
  • Click headers to sort!

Batted ball outcomes by pitch:

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Who Will Follow Dallas Keuchel’s Lightly Traveled Path?

As we anticipate Dallas Keuchel finding a new home this offseason, we should probably be wondering more about where he will be locating his sinker in 2019 than where his moving van is headed.

Sinker location has been key to Keuchel’s success, and his mostly-consistent five-year run has been nearly unique this decade. When he shaved more than two runs off his ERA from 2013 to 2014, Keuchel had a dramatic breakout that may have been most notable for what didn’t change. He didn’t throw substantially harder. He wasn’t notably better at throwing strikes or getting whiffs, chases or freezes. Keuchel did induce more grounders, but his biggest improvement came in his avoidance of hard contact. His rate dropped from 29.3 percent to 19.7 percent, and in the four seasons that followed, Keuchel continued to demonstrate that skill — as long as his sinker was down and away from righties.
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10 Biggest Swinging Strike Rate Gainers of 2018

Strikeouts have become a massive part of today’s game both on the field and in fantasy baseball. The ability to consistently miss bats is a key driver in success and can be a building block for a breakout. Let’s take a look at the top 10 gainers in SwStr% (min. 100 IP) and see what drove their gains.

Gerrit Cole, Astros | +4.6% to 15%

We’d been waiting for this Cole breakout since he debuted! He had the big 2015 season with 2.60 ERA and 1.09 WHIP in 208 IP, but even the 24% K rate that season felt short of what Cole’s arsenal could do at peak. There was a valid concern that Cole wouldn’t ever reach those heights, though. The Pirates preach heavy fastball usage which can undercut the potential of a secondary arsenal as strong as Cole’s. During Cole’s 2013-17 tenure in Pittsburgh, they led baseball in starter fastballs at 62%.

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The Biggest Pitcher K% Outliers of 2018

Mike Foltynewicz, a first-ballot Hall of Namer, immediately strikes me as someone who outperformed his strikeout rate (K%) in 2018. I don’t have to look far for confirmation: his 27.2% strikeout rate outstripped his 10.3% swinging strike rate (SwStr%) by a mile. Because whiff rate correlates so strongly with strikeout rate, it serves as a useful proxy for what one could expect of a pitcher’s strikeout ability.

I generally follow this rule of thumb when I’m reluctant to get too into the weeds when assessing peripherals: SwStr% * 2 = K%. It’s imperfect but useful in a pinch. Folty violates this rule of thumb pretty dramatically. Of 13 qualified pitchers who struck out at least 27% of hitters, his 10.3% swinging strike rate falls well short of the shortlist’s 2nd-lowest mark (Charlie Morton, 11.9%). Foltynewicz’s 2018 performance has already wilted under what amounts to very little duress.

Still, I wanted to allow Foltynewicz the opportunity to redeem himself. Whiff rate does not a pitcher make; there are other components to plate discipline allowed such as chase rate (O-Swing%) and zone rate (Zone%), among others, that describe each pitcher in much finer detail. I broke down a pitcher’s plate discipline allowed into its component pitch outcomes:

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Yusei Kikuchi’s Fantasy Value with Projections

When Yusei Kikuchi was posted in early December, he had only a month to sign with a team. For this reason, his signing decision was going to fall over the holidays and Seattle broke the news right before the end of the year. Because of the unique timing, he didn’t get a ton of press, but owners should be aware that he’s a decent starter and not to be ignored on draft day.

First off, the other Jeff beat me to writing about the 27-year-old lefty. Twice to be exact. Once before the signing and once after.
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Chris Archer’s Last, Best Hope

Fantasy owners have been chasing, to no avail, Chris Archer’s 2015 season, during which he recorded a 29% strikeout rate with a 3.23 ERA. After finishing just outside the top-50 overall by National Fantasy Baseball Championship (NFBC) average draft position (ADP), Archer averaged the No. 50 pick from 2016 through 2018. Unfortunately, the outcomes annually and in aggregate have been awful…

Chris Archer’s Career Halves
Years IP ERA WHIP K% BB% GB% FIP xFIP SIERA
2012-15 564.2 3.33 1.19 24.1% 8.1% 46.3% 3.36 3.47 3.51
2016-18 550.2 4.12 1.28 27.5% 7.5% 44.8% 3.64 3.44 3.54

… even though his peripherals before and after 2015 have been nearly identical. That’s the persistent problem with Archer: he has given us perpetual reason to chase results he may never again achieve.

I’m here to argue Archer’s woes started not in 2016, when his ERA ballooned to 4.02, but in 2015 — yes, his career year. That’s because he stopped throwing his sinker in 2015, opting instead to rely on a pitifully bad four-seam fastball as his primary offering. His 2015 success can be attributed primarily to his slider, which he began to feature much more prominently, but the remaining success was thanks to good luck.

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Charlie Morton & J.A. Happ Sign New Deals

We didn’t get a lot of earth-shattering moves at the Winter Meetings, but there was impactful activity, including a host of starting pitchers on the move. Al Melchior will be covering Lance Lynn’s deal with Texas soon and Mike Podhorzer had a piece on Tyson Ross, Ivan Nova, and Tanner Roark, so I’ve got the Charlie Morton and J.A. Happ signings for you.

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Joining New Teams — Ross & Nova & Roark, Oh My

The news just keeps coming, as players are signing a flurry of deals, making it hard for me to keep track of all the moves and those expected to become official. Within just the last couple of days, a trio of mediocre starting pitchers have joined new teams either via free agency or trade. Rather than go through the full park comparisons like I have been all week, let’s summarize the potential effects on Tyson Ross, Ivan Nova, and Tanner Roark. Will the park and team switches make these pitchers any more appealing? Let’s find out.

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Odds & Ends: Merrill Kelly & Non-Tendered Starters

Merrill Kelly

The Diamondbacks signed Merrill Kelly after Kelly spent four years in the Korea Baseball Organization. I never heard of Kelly until the signing some it’s time to put together a profile for him.

First, here’s a tweet from Homin on Kelly’s profile:

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