The Yankees bullpen is short on neither talent nor name value. Most baseball fans are aware of Aroldis Chapman, even if they’re not aware that he’s been in a funk. Likewise, many baseball fans are aware of Dellin Betances, and they’ve generally heard of David Robertson, who this year has re-emerged as terrific. To make the unit all the more deep, the Yankees acquired Tommy Kahnle, one of the year’s big bullpen breakout stories. Kahnle has struck out 38% of his opponents, ranking him seventh in baseball among regular or semi-regular relievers.

Kahnle, in the breakout sense, is a surprise. He finally has the results to go with the powerful stuff. And yet Kahnle may play second fiddle in here, because of another development. The highest strikeout rate for any reliever belongs to Craig Kimbrel. Well, sure. In second place, we find Kenley Jansen. Yes, of course. The name in third place reads “Chad Green.” And he’s up around 60 innings, so this isn’t just a hot week or month. Green has piled up the strikeouts, and as a consequence, he ranks seventh among all relievers in WAR. Chad Green made his season debut on May 9.

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Maybe you’ve noticed that Masahiro Tanaka is a little different these days. His recent good stretch has coincided with a trend we noticed a while back: he’s not really throwing the fastball any more. He’s not alone on the Yankees — it looks like it’s a team-wide phenomenon. But is it working for every Yankee?

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Chad Green’s 2-0 win-loss record and 2.05 ERA suggest he’s had a successful season. Those numbers only begin to tell the story. Pitching out of the New York Yankees bullpen, the 26-year-old right-hander has allowed just 27 hits in 57 innings while also recording 86 strikeouts. Doing the math, that’s 4.3 hits per nine and 13.6 strikeouts per nine. Augmenting those stellar stats is a 0.74 WHIP, which ranks as third best in baseball, behind only Craig Kimbrel (0.67) and Kenley Jansen (0.69).

Yesterday — in his 31st appearance on the season — the former Tigers prospect became the first pitcher in MLB history to record seven strikeouts while facing eight or fewer batters in a game. In December 2015, the Yankees acquired Green, along with Luis Cessa, in exchange for Justin Wilson.

Spin and velocity are among his closest friends. Green’s arsenal includes a solid slider, but his signature pitch is a four-seam fastball that zooms through the zone at an average speed of 95.5 mph. Thanks to a well above-average 2,478 spin rate, the University of Louisville product gets plenty of punch outs above the belt.

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Green on the reasons behind his breakout: “Last year, I figured out what I needed to work on, and this year it’s been about consistency. Last year, I wasn’t consistent. Some days I would have a good breaking ball, and some days I wouldn’t. Some days I would have good fastball command, and some days I wouldn’t.

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Hey, remember this guy?

It was Greg Bird, not Aaron Judge or Gary Sanchez, who was the talk of Yankees camp while producing eight home runs and a 1.654 OPS over 51 at-bats. It was Bird who seemed poised to build upon a promising 178-plate-appearance sample as a rookie in 2015 (.261/.343/.529 slash line and 137 wRC+) after missing all of 2016 with a labrum tear.

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Daily notes on prospects from lead prospect analyst Eric Longenhagen. Read previous installments here.

8/28

Tom de Blok, RHP, Detroit (Profile)
Level: Low-A   Age: 21   Org Rank: NR  Top 100: NR
Line: 7 IP, 2 H, 1 BB, 0 R, 8 K

Notes
de Blok has been one of the more interesting stories in minor-league baseball this year. He was signed out of the Netherlands by Seattle in August of 2013, but he didn’t enjoy his time training in Arizona, some of his things were stolen, and de Blok retired during extended spring training the following year.

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One of the best closers in the game is struggling. In fact, one of the best closers in the game isn’t even being used as a closer at the moment. Last week, Yankees manager Joe Girardi effectively demoted Aroldis Chapman from his end-of-game duties, stating that he would use the hard-throwing left-hander “at any point.” This followed a series of shaky outings during which Chapman conceded seven runs in 4.1 innings.

Though he possesses a strikeout rate that would still make most of the league jealous, it’s also the worst of his career. And while he’s also experienced some misfortune on balls in play, there’s a sense that the misfortune is “earned.” And it is, in a way. It’s a little bit about how he’s throwing the ball, but also a lot about where.

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Daily notes on prospects from lead prospect analyst Eric Longenhagen. Read previous installments here.

Pedro Avila, RHP, San Diego (Profile)
Level: Low-A   Age: 20   Org Rank: NR  Top 100: NR
Line: 7.1 IP, 4 H, 2 BB, 1 R, 13 K

Notes
This was Avila’s fifth double-digit strikeout game this year and his second in the last three starts, as he K’d 18 at Great Lakes on August 8th. A stocky 5-foot-11, Avila doesn’t have a huge fastball, sitting mostly 91-93 and dipping just beneath that from the stretch, but he frequently demonstrates pinpoint command of it, working to both his arm and glove sides. That gets Avila ahead in the count and sets up his deep-diving curveball, which bites enough to miss bats in the strike zone as well as below it. He also flashes a plus changeup. Avila began the year in High-A and struggled to throw strikes (but not miss bats) there for nine starts before a demotion. He has 102 strikeouts in 74.2 innings since then. Avila was acquired during Winter Meetings from Washington in exchange for Derek Norris.

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The notion that Aaron Judge would have to eventually make an adjustment this season isn’t all that surprising. What comes with being the largest, most physically intimidating player in the game is also the largest strike zone, the largest area within which pitchers and opposing game-planners can work.

And the counter-offensive to Judge’s remarkable first half has perhaps begun. Even after his home run Monday, Judge had recorded just a .170/.339/.360 slash line in the second half entering play on Tuesday.

Consider some facts regarding Judge and the fastball.

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Sunday night, Rafael Devers went yard against Aroldis Chapman, even though Chapman’s fastball was recorded at nearly 103 miles per hour. It’s the fastest pitch hit out in the pitch-tracking era, which has spanned nearly a decade, and that linked article was almost obligatory. Had to write something up. Devers tagged Chapman, even though it seemed like Chapman had his best stuff.

To a certain extent, you can’t blame Chapman for what happened. He threw a lefty-on-lefty fastball, with two strikes, kind of up and in at over 100 miles per hour. That pitch should basically never go for a homer. I’m still not sure how it happened. But, ignore the homer for a moment. Pretend it was a double, or a single. Or even an out! Whatever you like. Devers made contact. Solid contact, at that. The contact is what’s strange, and there are signs of a problematic trend, here.

Let’s examine Chapman’s career, shall we? I’ve prepared three rolling-average plots, each using samples of 30 games. This first one shows the development of Chapman’s average fastball.

You could argue there’s a recent down tick, but Chapman is still regularly reaching triple digits. His fastball is fast. Still a Chapman fastball. Like we all saw with the at-bat against Devers, Chapman can still run it up there about as hard as he ever has. So, based on the velocity, Chapman seems okay. Shifting to pitch location, we can see a trend from the past year and a half or so.

Chapman has been aggressive with pitching in the zone. He’s thrown two-thirds of his pitches for strikes, and this year in particular, he’s regularly gotten ahead with the first pitches of plate appearances. And, of course, with such an unhittable fastball, why mess around? Chapman had a terrific 2016, in which he came right after his opponents. This year, he’s done much of the same. But-

That plot shows contact rate. Chapman’s present contact rate is far higher than it’s been since earlier in 2013. All of a sudden — it’s not so much that Chapman is hittable, but he’s a great deal more hittable than he’s been. Look at this table of the biggest contact-rate declines from last year, with a minimum of 30 innings:

Chapman has a contact rate of 75.2%. The league-average reliever has a contact rate of 75.4%. No pitcher’s contact rate has dropped by more, and although Chapman is still mostly okay, and although this could be a blip, he was on the disabled list for a month, with a rotator-cuff problem. His contact rate has only risen since he came back. The velocity is there, and maybe that’s the most important thing, but you do have to wonder. Chapman’s been one of the most dominant relievers anyone’s ever seen. Real cracks appear to be forming.

Related to this, consider Chapman’s year-to-year ranks among all relievers in Win Probability Added:

• 2011: 24th
• 2012: 8th
• 2013: 44th
• 2014: 15th
• 2015: 16th
• 2016: 7th
• 2017: 337th

I don’t know what the issue is. It wouldn’t be a surprise at all if it were linked to the injury. In that case, it would be nice to have an explanation. But even then, explanation isn’t resolution. Aroldis Chapman is allowing roughly league-average contact. He’s in the first year of the largest contract a reliever has ever signed.

The most improbable home run I’ve ever watched in real time was hit last November. You know the one — it was the one hit by Rajai Davis, against Aroldis Chapman, with Davis choked halfway up the barrel. I’m sure that, mathematically, there have been home runs of a lesser likelihood, but that Davis blast just felt impossible. It didn’t feel real until the ball cleared the fence. I still can’t believe it happened, and the Indians still lost the game a couple innings later. I don’t care. I recall the Davis home run more clearly than anything else.

In truth, in my book, any home run against Chapman counts as improbable. I don’t know how he ever gets touched. And yet, Davis, at least, was batting right-handed. He had the platoon advantage. And the pitch he lined out to left field clocked in at a hair over 97 miles per hour. Fast, but not *outrageously* so. There are plenty of pitchers out there who can throw 97. Sometimes they give up dingers. The Davis home run, realistically, never should’ve happened, but I can bring myself to get it. I can understand the mechanism.

When Davis took his hopeful swing, Rafael Devers was, I don’t know, somewhere. Probably, he was watching. But no matter what he was doing, he was doing it having recently turned 20 years old. He was a good baseball prospect, but he was one who hadn’t yet encountered Double-A competition. I’m not sure how close Devers felt like he was. Yet Sunday night, you could say that Devers arrived.

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