No team’s batters have ever seen fewer four-seam fastballs than the Houston Astros this year. Few teams’ pitchers, meanwhile, have thrown fewer four-seam fastballs than the Houston Astros this year. This all has something to do with changes in baseball, yes, and also with the personnel on this current team. But there’s also a wrinkle to the thing that tells us a little more about why these trends are happening, and why the Astros are at the forefront in both cases.

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There are two types of stories you might be growing tired of reading. This guy figured out how to hit home runs. Well, there are home runs everywhere. And, this guy figured out how to get more strikeouts. Well, there are also strikeouts everywhere. Home runs. Strikeouts. Home runs. Strikeouts. It can feel sometimes like the game is nothing but home runs and strikeouts. It’s not, but it is more than it’s ever been. I’m sure many of you are craving diversity.

But Brad Peacock is leading all starting pitchers in strikeout rate. Not Chris Sale. Not Max Scherzer or Clayton Kershaw or Corey Kluber. Brad Peacock. Yeah, I had to lower the innings minimum, because Peacock hasn’t been starting the whole time, but when he was a reliever earlier on, he got a whole bunch of strikeouts, too. Let me show you a table, including 2016 and 2017 contact rates allowed:

Peacock has a long history of pretty average contact rates. Relatedly, he was essentially a replacement-level pitcher. Now a third of all swing attempts are missing. This can’t not be discussed. Strikeouts might be everywhere, sure, but this is the first time Peacock has managed to find them.

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With Josh Reddick sidelined by a concussion, the Astros summoned 23-year-old center fielder Derek Fisher to the big leagues yesterday. The early returns are good: in his debut, Fisher went 2-for-3 with a homer and two walks.

Fisher had more than earned this opportunity, slashing .335/.401/.608 at Triple-A this year. A power-speed threat, Fisher eclipsed 20 homers and 20 steals in both 2015 and 2016, and Eric Longenhagen gave him raw power and speed grades of 60 and 70, respectively. Fisher had a bit of a strikeout problem in the past, but has managed to slice his strikeout rate from 27% last year to 19% this year without sacrificing any of his power.

KATOH loves Fisher, which shouldn’t come as much of a surprise given his excellent performance this year. I have him projected for 8.1 WAR over his first six seasons by stats-only KATOH and 6.3 WAR by KATOH+, which incorporates Eric Longenhagen’s relatively modest 45 FV grade. Those projections make him the 18th- and 48th-best prospect in baseball, respectively.

To put some faces to Fisher’s statistical profile, let’s generate some statistical comps for the toolsy center fielder. I calculated a Mahalanobis distance between Fisher’s Double-A and Triple-A performance and every season since 1991. In the table below, you’ll find the 10 most similar seasons, ranked from most to least similar. The WAR totals refer to each player’s first six seasons in the major leagues. A lower “Mah Dist” reading indicates a closer comp.

Please note that the Mahalanobis analysis is separate from KATOH. KATOH relies on macro-level trends, rather than comps. The fates of a few statistically similar players shouldn’t be used to draw sweeping conclusions about a prospect’s future. For this reason, I recommend using a player’s KATOH forecast to assess his future potential. The comps give us some interesting names that sometimes feel spot-on, but they’re mostly just there for fun.

It’s not immediately clear how, or how often, Houston will work Fisher into their lineup once Reddick is healthy. But Houston would perhaps benefit from shifting some of Nori Aoki’s at-bats to Fisher, giving them an outfield of Fisher, Reddick and George Springer. Regardless, Fisher’s rare combination of power, speed, and contact ability makes his future look incredibly bright. And he made it clear with his 2017 performance that he has nothing left to prove in the minor leagues.

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

Yordan Alvarez, DH/1B, Houston (Profile)
Level: Low-A   Age: 19   Org Rank: HM   Top 100: NR
Line: 2-for-5, 2 HR

Notes
Alvarez is hitting a preposterous .413/.500/.693 as a 19-year-old in full-season ball. Even once you acknowledge that better hitters at lower levels are going to have especially high BABIPs because they’re hitting balls harder than the baseline player at that level, Alvarez’s current .553 mark is unsustainable. Nevertheless, reports on the ease of his power and picturesque swing are very strong. There’s some swing-and-miss risk here but also a potential middle-of-the-order bat.

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I think every article about this year’s Astros is supposed to begin in the same way, so, who am I to defy convention? Let’s just embed this and move on:

We don’t need to review the feature. We don’t need to review the things it got right and the things it got wrong. It’s unlikely to be remembered for more than the headline, because that’s the way the reading public works, and here we are, three years later, and the Astros have baseball’s best record. The best record by a decent margin, at that, and the Astros also happen to have our second-highest odds of winning the World Series. No team has improved its World Series odds more since the start of the year. I just got an email an hour ago from some gambling business that currently has the Astros as its World Series favorites. This could become a reality. Chances are, it won’t, yet the Astros’ odds have never looked better. The Astros are good. That doesn’t sound as weird as it used to, but the process is complete. Winning is all that’s left.

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When you look up and see that the Athletics are in the midst of a two-game mid-week series against the Marlins in late May, you might suspect that the major-league baseball schedule is simply an exercise in randomness. At this point in the campaign, that’s actually sort of the case. The combination of interleague play and the random vagaries of an early-season schedule conspire to mean that your favorite team hasn’t had the same schedule as your least favorite team. Let’s try to put a number on that disparity.

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These days, we’re blessed with a number of amazing young shortstops. Carlos Correa, Francisco Lindor, and Corey Seager, for example, are already among baseball’s top players. Manny Machado is a shortstop who just accidentally plays third base. All of them are younger than 25.

Second base isn’t as notable for its youth. Last year, however, second basemen recorded one of the top collective offensive lines at the position in the history of the game. Good job, second basemen.

So both positions are experiencing a bit of a renaissance at the moment. This led me to wonder which teams might be benefiting most from that renaissance. It’s rare that teams can keep a second baseman and shortstop together long enough to form a lasting and effective double-play combo. Right now, MLB has some pretty great ones. But which is the greatest — particularly, on the defensive side of thing? Let’s explore.

First, we want to know who has played together for awhile. Since the start of the 2015 season, 21 players have played at least 200 games as a shortstop, and 23 have done the same at second base. Cross-referencing them and weeding out the players who have played for multiple teams, we get the following list:

That’s a pretty good list. There are some tough omissions here. The most notable is the Angels, as Andrelton Simmons hasn’t been with them long enough to meet our bar here. Given Johnny Giavotella’s defensive contributions, however, we can guess that the combo here would be quite one-sided. Also excluded are teams with new double-play combos, like the Dodgers and Mariners. Not only are the Logan Forsythe-Corey Seager and Robinson Cano–Jean Segura combos new this season, but thanks to injuries they haven’t even played together much this season. Cano-Segura has only happened 22 times this season, and Forsythe-Seager only 10 times.

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Just after sunrise on August 6, 1974, Philippe Petit began his walk across a 200-foot stretch of wire spanning New York’s Twin Towers. He and his assistants had prepared the wire overnight, using a crossbow to connect the one-inch-wide walk way from rooftop to rooftop, 1,350 feet above Lower Manhattan. Petit completed eight walks that morning before being ordered down, and arrested, by New York City police. The Telegraph (U.K.) recounted the daring feat.

[Petit] felt so confident that he took to showboating… The Frenchman is shown [via photograph] lying down on the wire while balancing his bar across his chest with his arms well away. At one point the 24-year-old hung by his heels….

He later said: “To me, it’s really so simple: life should be lived on the edge. You have to exercise rebellion, to refuse to tape yourself to the rules, to refuse your own success, to refuse to repeat yourself, to see every day, every year, every idea as a true challenge. Then you will live your life on the tightrope.”

Petit’s chosen line of work is not for everyone. That said, there might be some wisdom in his view on how to live regardless of your profession.

Nearer ground level this year — in fact, on a pitching mound for the Astros — Dallas Keuchel is conducting his own tightrope walk. A former seventh-round draft pick with just an 89-mph fastball, Keuchel has always been compelled to find ways to adapt and push boundaries. Last month, FanGraphs’ Jeff Sullivan noted Keuchel’s latest makeover — namely, that the left-hander is going “Full Ziegler” on us.

Wrote Sullivan:

Nearly everything has been at the knees or below, just like how Ziegler works, and at least to this point, it’s been working. As usual, I’ve made some use of Baseball Savant. Using the filter options, I selected the five lowest pitch-zone areas. There are 220 pitchers who’ve thrown at least 100 pitches in both 2016 and 2017. Among them, last year, Keuchel had the No. 31 low-pitch rate. This year, he has the No. 2 low-pitch rate, slightly behind only teammate Luke Gregerson. Keuchel’s low-pitch-rate increase of 17 percentage points is the fourth-greatest, and he already worked mostly down. Now it’s like he doesn’t even pay attention to the other spots.

Keuchel is off to an excellent start this season with the Ziegler approach, producing a 5-0 record and 1.21 ERA. But I wonder how much longer this success can last.

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CLEVELAND – Like so many others, Chris Devenski watched in fascination last October. He observed, on the flat-screen television of his offseason home in San Diego, as Cleveland continuously elected not to save their best arm, Andrew Miller, for the ninth inning, but rather to utilize him in high-leverage situations earlier in the game.

Unlike the many other major-league pitchers watching, however, Devenski recognized the part Miller was playing: he himself had already assumed a similar new-age bullpen role in the second half of the season with Houston. He had, in fact, become accustomed to entering games at unlikely spots much earlier than that, from his experience as a piggy-back tandem starter in the Astros’ farm system. As Cleveland advanced through the playoffs, Devenski watched as the movement to rethink bullpen usage and role — a movement of which he’s a part — advanced. The revolution was televised.

“I saw my role, man,” Devenski told FanGraphs last week. “I saw what they were doing with Miller here [in Cleveland] and [Aroldis] Chapman with the Cubs, it seems like that is what is coming about now in the game. It’s changing a little bit. I saw [in Miller] what I do. It was pretty cool. It’s big-time situations there. It’s important.”

But Devenski is arguably more of a revolutionary, more of disruptive figure than Miller. Since joining the Indians, Miller has pitched in high-leverage situations often, but he’s only recorded two or more innings in an outing three times in the regular season. He’s never recorded more than six outs in an appearance. Devenski had 18 such outings last season alone, including nine in August and September when the then-rookie was thrust into more high-leverage situations.

Devenski has recorded six or more outs in seven of his nine appearances this season and has an absurd 49.2-point strikeout- and walk-rate differential (K-BB%) and 22% swinging-strike rate. He has become a unique weapon in an unusual role.

Devenski said his wide range of experiences — from starting to relieving to tandem-starting — made the job a natural fit. While most pitchers would rather start or rack up saves, Devenski seems to have embraced his work in a hybrid capacity.

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CLEVELAND — We know the Astros are one of the most forward-thinking, analytically minded organizations in baseball. They’ve led baseball in infield shift usage in recent seasons. They’ve experimented with piggy-back rotations in the minor leagues, they’ve been creative in maximizing draft pools, and have given us a revolutionary bullpen figure, the gift that is Chris Devenski.

They’ve also been as aggressive as any team I’ve observed with regard to outfield alignment.

Outfield alignment doesn’t receive as much attention as infield shifts. There are few, if any, outfield alignment measures publicly available, and we don’t often see outfield alignments in full scope on television broadcasts prior to a batted ball. Average depth is recorded by Statcast, but we’re still working on understanding optimum outfield positioning.

But the Astros are up to something — something which I first noticed last season at PNC Park.

Since air balls are more evenly distributed than ground balls, there are typically fewer radical defensive alignments in the outfield. Since there are only three fielders tasked with covering a much larger area of ground than in the infield, outfielders are generally kept in equidistant positions, spreading risk. But the above alignment against the left-handed-hitting Gregory Polanco represented an extreme swing to the left. It appeared counterintuitive, too, with the Astros playing Polanco as if he were an extreme right-handed pull hitter. In this case, the left fielder was near the left-field line, the center fielder shading toward left center, and the right fielder nearly in right center.

But the approach appears to be rooted in logic, too. While most ground balls are pulled, air balls are more evenly distributed, with batters often slightly favoring the opposite field.

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