It has been a little while since I introduced to you my Weighted Plate Discipline Index (wPDI) for pitchers. wPDI is a (new) plate discipline index metric that aims to meaningfully aggregate the frequency of pitcher plate discipline outcomes into one composite figure. A pitcher who generates a lot of contact in the zone will have a lower wPDI, while a pitcher who generates a lot of swings and misses out of the zone will have a higher one, etc.

We are now almost halfway into the 2019 season. Let’s check up on the 2019 wPDI Leaderboard for RPs – i.e. the relief pitchers who are excelling in plate discipline.

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Earlier this season on FanGraphs, Ben Clemens embarked on a journey to search for a player similar to Mike Trout. Now of course, no one in the past half-decade has come close to replicating Trout’s production – but it was a fun exercise in player comparison analysis. My colleague found that Tommy Pham was Trout’s closest match.

Consider the following blind resumes for 2019:

The three players profile very similarly. They all have a fly-ball tilt to their batted ball tendencies, with few line drives. They all have large HR/FB ratios, and each have high hard-hit and medium-hit rates.

By the title of this article, you likely have already guessed the true name of one of the above lines. Player A is none other than Khris Davis.

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Introduction:

If you are reading this article, you likely play fantasy baseball. You are already well aware of the FAAB extravaganza which occurred two weeks ago. If your fantasy squad is sitting 40 points out of the money, the lure of an impact prospect on your roster was incredibly enticing. The peer pressure of bidding on a top 10 prospect surely lured you in to spend significant free agent resources on those young rookies.

The Great Fantasy Baseball Invitational (TGFBI), was created by FanGraphs’ own Justin Mason. It is a compilation of 315 fantasy baseball experts – all who put out content one way or another (writing, projections, podcasts, etc.). The experts were divided into twenty-one 15-team 5×5 mixed roto leagues, with NFBC rules and regulations.

You can find out more about TGFBI and follow the experts here. You can listen to me regularly on the official TGFBI analysis podcast, called “Beat the Shift” right here.

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Introduction

I made the following controversial proclamation earlier this year – that Chris Archer is highly overvalued by fantasy owners. I go even further to say that in all but deep mixed leagues and mono leagues – continually rostering the right hander would be a poor use of fantasy resources.

My contention with Archer’s value stems from his ratio stats:

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Today, I wanted to highlight a few catchers that caught my eye. Currently, all of these players are options only for mono leagues, or for the deepest of two-catcher mixed leagues. I feel that these players are under-owned or under-valued or are simply worth monitoring.

Remember – deep league catchers are not going to give you a full or broad base of statistics. Catchers hardly steal bases, not even the ones suited for shallow leagues. As a fantasy owner – what you hope to attain from a catcher in the #20–30 range is a player that possesses at least one skill. You want a catcher who either can provide you with a modest power boost, or someone who can accumulate a decent on-base average, or a catcher that will occasionally kick in some Runs/RBIs. Anything else is gravy.

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Last week, I quantified a 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].

The introductory article to wPDI, the Weighted Plate Discipline Index for pitchers, can be found here.

Today, let’s turn the tables around and jump into the hitting equivalent. We can enumerate the offensive parallel of the quote – and evaluate what would be the “Maddux keys to hitting.” A Maddux hitter would swing at pitches when they are thrown in the zone and would lay off of pitches thrown out of the zone.

We will use the wPDI framework to help us quantify what we will call a “Maddux hitter.” For the hitting version of mPDI – the weights of the outcomes will be the exact inverses of the pitching indexes.

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“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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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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Opening day is finally here!

Draft season is now ending. It is time for our fantasy teams to finally start accumulating statistics (Japan series aside). After the long winter, the excitement of a new season has finally reached its pinnacle.

Now it is time to share my 2019 bold predictions with you. The ATC Projections helped shape some of these. Others come from my own personal analysis on the player, or team situation. The rest arise from blind optimism or the crossing of my fingers. These are all possibilities that could happen, that I feel will happen if things break just right.

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In my previous post, I looked at the hitting landscape for The Great Fantasy Baseball Invitational (TGFBI) drafts. I also analyzed my own personal team in League #6 providing player commentary along the way.

Now let’s focus on the pitching.

General Observations

Closers

The first closer, Edwin Diaz was selected in either the 4^th or 5^th rounds of all TGFBI drafts. Diaz was the consensus top closer.

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