“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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Apologies for a brief and belated Bullpen Report but let’s jump right into Saturday’s games…

• Taylor Rogers pitched in the 8th inning last night with the top of the Phillies lineup up, and no real platoon split to speak of. Although he wasn’t particularly sharp he threw a scoreless inning handing it off to Parker in the 9th. The Twins put the game out of a saves reach in the top half of the inning so there was no save situation for Parker. While this situation was being used as a fairly strict platoon it looks like Rogers 8th and Parker in the 9th might be calcifying somewhat. I’ll keep the committee tag for now but Parker is affirming himself ahead for now.

• No save situation for the Royals last night but that was due to the pen blowing the lead before the 9th. Wily Peralta pitched in the 7th to clean up Kevin McCarthy’s mess but he wasn’t particularly effective himself and now carries a 15.00 ERA with only two strikeouts and four walks in three innings pitched this year. Brad Boxberger and Jake Diekman might be ahead of him in the committee at this point. Additionally, although Ian Kennedy has not been special this year, just exhibiting competence might be enough to run with this job at some point. I would bet on Kennedy’s end of season save total over the others in the Royals pen but I also don’t envision that number being particularly high or with ratios that help a team.

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• Although Jose Alvarado might have a 99 mph screwball he’s not quite the full time closer on the Rays. Last night Alvarado came in 8th inning in a tie game, striking out the side ending with lefty Charlie Blackmon. In the 9th, Diego Castillo came on to face David Dahl, Nolan Arenado, and Trevor Story. This wasn’t quite an obvious lefty/righty situation but Castillo was in there to face the tough right handed hitters on the Rockies. In my first Bullpen Report I suggested that Alvarado was inching towards being the main closer but that certainly doesn’t seem to be the case anymore. Both Alvarado and Castillo are worth owning, almost regardless of if they are receiving saves, but this is a committee situation for the time being.

• Whether or not David Robertson would be used as a traditional closer to reign in Gabe Kapler or not, the Phillies expected better results than he’s providing right now. Robertson entered the game in the 9th with the game tied and proceeded to go single, walk, walk before walking in the winning run. In three appearances this year Robertson has five walks with only one strikeout. It’s definitely still early and there are no velocity concerns but Seranthony Dominguez, who wasn’t effective either blowing the lead in the 8th, could see some more save situations than expected if Robertson doesn’t get on track soon.

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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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• Due to a right lat strain, the Seattle Mariners placed closer Hunter Strickland on the Injured List. With Strickland out the Mariners closer job is now up for grabs with manager Scott Servais saying “it could be Zac Rosscup one night, it could be Elias, it could be Gearrin or Festa or Rumbelow. Go down the list. We’re looking for somebody to get us three outs.” This certainly sounds like a committee in the making and we have adjusted the grid accordingly. Right now we have Cory Gearrin leading the list but it’s really anyone’s guess on a given night. Yesterday Rosscup started the 9th inning but was unable to finish with Nick Rumbelow coming on to get the final out and his first save.

It might be worth placing a claim on Gearrin for a couple of saves, although I wouldn’t recommend investing much. Of more interest is Anthony Swarzak who should be returning this week from a shoulder injury. Acquired from the Mets in the big Robinson Cano trade this offseason, Swarzak is both the best and most expensive option in the Mariners pen and I would bet on him floating to the top of the committee over all the other names listed.

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I remember back in mid-December when first putting together a reliever ranking that I eventually threw my hands up around the early-20s and comforting myself with the idea that things would be much clearer by the time draft season kicked into high gear.

I was wrong.

A few situations have become clearer, but what I didn’t quite anticipate was that even more teams would push toward a more open setup rather than committing to one guy. Even a team like Philadelphia that brought in David Robertson and his 137 career saves has acknowledged that he will still share some of the duties with Seranthony Dominguez.

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Yesterday, I examined some hitters with the largest plate appearance projection discrepancies using five separate sources. Today, pitchers take center stage.

I’m using the projected playing times from FanGraphs Depth charts and four other sources. Again, I won’t name them as I don’t want to debate the merits of each. My goal is to just find and evaluate different takes on the same players.

The differences aren’t nearly as drastic as the hitters, especially for the top arms. Most of the major differences involve around unknown roles and injury risks. I listed the top-200 at the end while the values for free agents and foreign signings may be off or missing. I’m going to focus on the biggest differences in some top-ranked pitchers.

Ross Stripling
Range (Max-Min): 67
Average: 112
Standard Deviation: 33

I’m not surprised one bit on Stripling. Unless the Dodgers get hit with a ton of injuries to their starters, he’s going to begin the season as a reliever or in the minors. He’s got the talent to be a top-20 starter but the number of starts he’ll get is unknown. Owners can draft him and hope his talent forces the Dodgers hand. The other issue is that he’s on the Dodgers who manipulate their roster to give pitchers scheduled days off via demotions or “injuries”. Good luck guessing right with him.

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There are only 12 closers in major league baseball. And by this, I mean there are only 12 pitchers who, right now, feel like a 100 percent lock to be the Opening Day closer for their team. Barring injury of course. I won’t make you work for the list. Here it is in an early semblance of order:

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Yesterday saw some fantasy applicable free agent signing occur which deserve a discussion.

A.J. Pollock signs with the Dodgers

I can’t quit Pollock, almost to a fault. I keep latching onto his 2015 season even though he hasn’t played over 113 games since then because of injuries. Now, he is going to a team notorious for limiting playing time thereby making his value is tough to unwrap.

He was productive during his stretch of limited playing time. Prorating his three-year stats down to 600 PA, he would have 88 Runs, 23 HR, 73 RBI, 23 SB and a .261 average. It’s tough to find a player with similar 2019 projection but here are a few. Ronald Acuna is at 28 HR, 24 SB, and .276 AVG. Braun at 25 HR, 13 SB, .265 AVG. Tim Anderson with 17 HR, 21 SB, .252 AVG. If playing a full season, he’s a top-50 hitter.

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There wasn’t a ton of moves with fantasy implications over the weekend but there was enough to lump together some. I’m still at the point that no major team breakdowns can really start with the two big bats still available. Anyways, here is a breakdown of the moves:

Phillies sign David Robertson

The 33-year-old righty immediately joins the Phillies closer discussion for the simple reason he’s projected to be the best bullpen arm. Steamer has him for a 3.22 ERA with Seranthony Dominguez next at 3.39 and previous closer Hector Neris at 3.62.

The Phillies front office would prefer Robertson to close instead of the other two to save money. The team is already on the hook for his $23 million dollar contract, so his price is set. The more Saves the pre-arbitration arms get, the higher their arbitration contracts will cost.

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