“The key to pitching is to have the ability to throw a strike when they’re taking and throw a ball when the hitter is swinging.” – Greg Maddux

Last week, I introduced a pitcher metric based on the six possible plate discipline outcomes. You can find the definitions and indexes in the wPDI introduction article, found here.

This week, I would like to provide you with an alternative weighting of the indexes. It will parallel the famous quote by Hall of Fame pitcher, Greg Maddux. He preached that the key to pitching is to throw a strike when the batter isn’t going to swing, and to throw a ball when the batter will [swing].

With the wPDI outcome framework in place, we can now properly quantify Greg Maddux’s quote.

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After just a start or two, all we really care about for starting pitchers is thus:

1) Velocity
2) Pitch mix
3) Underlying skills like GB% and SwStk%

I’m going to tackle the latter, the starting pitchers who have posted monster SwStk% marks in their first start. I’m going to mainly include surprises near the top of the leaderboard. Sorry Jacob deGrom, you and your ridiculous, second ranked 18.3% SwStk% will not be discussed here.

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Today finishes my examination of starting pitcher pitch mix and velocity from the first two days of the month. Some of the starters overlap from my first article and I used their combined numbers.

My goal in examining these starters is to find ones who have changed over the offseason. As owners, we may need to immediately adjust our projections. Also, to save space, when I mention a pitch changes a certain percentage, I mean percentage points (ex. up 10% = up 10% points or from 12% to 22%).

April 1st

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Welcome to the first edition of the deep league waiver wire of the 2019 season! In this weekly column, I’ll present to you two players owned in 10% or less of leagues on CBS that deserve your attention in deep leagues. Sometimes, my recommendations are also worthy of considering in shallow leaguers, which is exciting! I’ll share such thoughts in those situations.

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A few days ago, I examined the pitch mix and velocity for all the Opening Day starts. Today, I tried to catch up but failed. I just couldn’t examine another 30 pitchers. Tomorrow, I’m going to try my hardest to give a glimpse at everyone remaining.

My goal in examining these starters is to find ones who have changed over the offseason. As owners, we may need to immediately adjust our projections. Since there is a ton to get through, here are the daily starters ordered by fastball velocity change. Also, to save space, when I mention a pitch changes a certain percentage, I mean percentage points (ex. up 10% = up 10% points).

March 29th

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Today, I will attempt to develop a simple pitcher metric. My exercise will provide us with a recapitulation of the plate discipline data at our disposal, while at the same time afford us the opportunity to unearth some fascinating pitching tendencies of lesser known hurlers.

To do this, let’s start with the basic ingredients of plate discipline, from the point of view of the pitcher.

We can break down any pitch into these simple binary events:

1. Was the ball thrown in the strike zone?
2. Was the ball swung on?
3. Did the batter make contact with the ball?

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Each week (on Monday or Tuesday depending on my schedule) I’m going to talk about something from the previous week in a pack of 10. This week we’re only working with four games, but I still found 10 unexpected gems worthy of some attention.

Trevor Williams | PIT at CIN: 6 IP, 3 H, 0 ER, 6 K, 1 BB, 13% SwStr

I’m not going to overreact after the one start, but another gem gives him a 2.02 ERA and 1.06 WHIP in his last 18 starts, spanning 102.7 innings. He has just a 12% K-BB rate in that time which fuels the skepticism and most relievers can’t sustain an 87% LOB rate, let alone starters. I’m reluctant to think I got it wrong on Williams just because he picked up where his 2018 left off. Maybe he’s more of a true talent 3.75 ERA than the 4.00-4.20ish level I suggested during his big run.

He gets Cincy at home in his next start, I’d use him for that in most formats where streaming is viable.

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4/1/19

The latest episode of “The Sleeper and the Bust” is brought to you by Out of the Park Baseball 20, the best baseball strategy game ever made – available NOW on PC, Mac, and Linux platforms! Go to ootpdevelopments.com to order now and save 10% with the code SLEEPER20!

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If any stat can be monitored with a small sample, it’s pitch velocity. Fastball velocity stabilized with a sample of ‘1’. Just one fastball is enough to know a pitcher’s velocity going forward. I collected the Opening Day starters’ fastball velocities and compared them to last year’s values. It’s all we can really do at this point in the season.

Additionally, I compared this year’s and last year’s pitch mix. Mainly, I was hoping to find if a starter dumped or added a pitch. I didn’t mention a pitch if its usage didn’t change by  10% points or more.

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Almost exactly seven years ago, I shared a study on the predictive value of pitcher strikeout and walk rates posted during spring training. Though most know that most spring training stats mean nothing (somehow, there are still those who think spring stats like ERA actually have predictive value), spring strikeout and walk rates do improve projections when incorporated. That said, we still have the same size issue to deal with, various levels of competition, and pitchers working on things that makes them not the actual pitcher we know them as. With those caveats out of the way, it’s at least worth being aware of pitchers striking out significantly more than projected to.

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