Going Deep: J.P. Crawford Made The Jean Segura Adjustment

You won't find him at the top of any exit velocity charts—at least for now. Michael Ajeto digs in to see if J.P. Crawford is legit.

Over the offseason, the Seattle Mariners began what they are calling a “retooling” process, in which they traded James Paxton, Robinson CanoEdwin Diaz, and Jean Segura (among several others) and let Nelson Cruz sign elsewhere. The Segura trade specifically drew criticism, as the Mariners’ return was seen as underwhelming given Segura is in the middle of his supposed prime, and they had to add players on top of everything else. There was much more to this trade than Segura, but by my count, the Mariners are saving approximately $27.3M over the course of the next three years. Additionally, they moved a 29-year-old shortstop in Segura whose skillset is likely not so conducive to aging, in exchange for J.P. Crawford, who is 24 years of age. As it turns out, he’s maybe not all that inferior to Segura, even in the short-term.

The season is young, and the trade is younger, relative to how long it will take to play out, but I first want to take a look at the two key players in the trade: Crawford and Segura.


Segura, 2019 327 5.2 12.2 .180 .285 .324 99
Crawford, 2019 142 10.6 23.2 .190 .396 .371 139


Segura started off the year hot, cooled down in May, and has been absolutely frigid in June. Crawford, despite being slowed by an ankle injury, has started to really come on as of late. In the table above, I think a few things stand out. First, the sample size. Crawford hasn’t been doing this for all that long, and many mediocre players have been far better for much longer. Second, for a player with rather limited game power, Crawford strikes out an awful lot. Lastly, the BABIP! My god, the BABIP!

While the numbers are impressive, what also stands out is Crawford’s approach—we’ll touch on this later, per usual. In terms of strikeouts, I don’t think this is representative of Crawford’s plate discipline or contact skills. At all. If you’re not convinced, here’s a rolling graph of Crawford’s strikeouts:



As a major leaguer, we haven’t seen Crawford strike out this infrequently, for this long. This isn’t the only reason for optimism, but it’s a reason for optimism. I don’t think the strikeouts will remain this low forever, but I am a believer in this as a sustainable change.

As for his .400 BABIP, I’m not convinced that he doesn’t deserve every single bit of it. Per Baseball Savant, Crawford’s BA-xBA is .015—for reference, teammate Dee Gordon has a BA-xBA of .014. That’s convenient, because by sprint speed, Crawford ranks in the 71st percentile, while Gordon is currently ranked 80th. They both have consistently outperformed their expected statistics over the past few years, because they’re both fast. Combined with the fact that Crawford hits the ball with more authority than Gordon, this all leads me to believe that Crawford has been neither lucky nor unlucky—he’s just been good. And it’s all supported by a sound approach.


A Sight For Sore Eyes


To demonstrate how good of an eye Crawford has, I filtered by the lowest outside-swing percentages, and exported the data into an Excel sheet. By outside-swing percentage, Crawford is 28th lowest. This is good—it means that Crawford is one of the stingier hitters in the league when it comes to pitches outside of the zone. But hitting isn’t all about taking unfavorable pitches. It’s also about swinging at good ones. Here, by zone-swing percentage, Crawford ranks 139th of 320th. That doesn’t sound great, but it’s a touch above average—57th percentile—and that’s all you can ask for.

Next, I created a table a list of the top 50 players by outside-swing percentage and then filtered by zone-swing percentage minus outside-swing percentage. It’s not perfect, but it’s a nice cheap way of looking at plate discipline—all zone pitches are not created equal, and the same can be said of outside-zone pitches. General speaking, though, you want to take balls out of the zone and find good ones to hit inside the zone. Here, we find that by zone-swing minus outside-swing percentage, Crawford ranks 13th. To give you an idea of who he stacks up with, he’s surrounded by the likes of Anthony Rendon and Brandon Belt. Needless to say, that’s pretty good.




During spring training, the Mariners worked on making some adjustments to Crawford’s swing. According to Seattle Mariners GM Jerry Dipoto, Crawford was a specific target of several members of their analytics team during the offseason. This is likely why: They saw a buy-low opportunity and went for it. Over at Lookout Landing, John Trupin looked at the adjustments Crawford has made from last year. Essentially, his swing had gotten long and loopy last year, which explains his subpar 2018. This year, he’s shortened it and has become a much more complete hitter as a result.

Per 710 ESPN Seattle, Crawford on his swing:

“I need to use more of the field and not try to pull too much. It causes a little bit of a loop in my swing. Not trying to hit the ball too hard allows my hands to work through the zone and out the zone instead of pulling off of it. Try to hit the ball up the middle every time no matter if it is inside or outside you always want to keep your hands going forward instead of going around. It’s a feel thing getting out of the pull. Sitting inside trying to hook balls and trying to hit homers, that’s when I get into a little funk.”

Really, what Crawford is talking about here is not pressing or selling out for power. When he does this, his mechanics get out of whack and, well, 2018 happens—and 2018 was not good. His swing has been much more compact this year, which has helped him to keep the ball up the middle or dump the ball the other way. For Crawford, that’s the name of the game. If he gets into one that goes over the fence, that’s nice too.

He’s done a much better job of spreading the ball around in 2019. Crawford’s spray charts, in 2018 and 2019:



What we’ve seen is a greater distribution of balls to all fields, as well as more power the opposite way. You may also notice that Crawford has begun hitting doubles the other way—a few of them may have been home runs in other parks, too.


Here’s an example of his loopy swing from last year:




Really, really sloppy. Everything is out of sync, and there’s a lot of superfluous movement. Namely, when he sets to plant his front foot, the head of the bat moves back towards the pitcher before he sends his hands towards the ball. Overall, there’s a lot of head movement, hand movement, and too many moving parts.

I’ll break them up even further to show you exactly what I’m saying. Here’s the extra movement of his bat before he throws his hands forward toward the ball, from 2018:




As you can see, the top of his bat points towards the pitcher and then starts towards the ball. If that’s not clear, watch his hands: They move back before they move forward. His hands are moving away as the pitch is moving towards him. Inefficient, unneeded movement.

And here, you can see all of the movement in Crawford’s hands as he works toward the ball. Again, from 2018:




This is really, really awful. You can see his hands lower, and then they go out towards the ball. It’s quite literally almost two completely different movements, whereas it should be one direct movement to the ball. And actually, it’s quite reminiscent of Jean Segura before he changed his setup a few years ago. If you’ll remember, Segura lowered his hands in 2016. Before then, his hands would go down, then up, and then to the ball. In lowering his hands, it allowed him to reduce hand movement and go straight to the ball. After this change, he had a career 5-WAR year that he has yet to eclipse. This is precisely the change that Crawford has made.

Here’s an example of sounder mechanics, from this year:




Crawford sets up with his hands lower, with a more open stance. His timing is much better, and there’s significantly less movement of the bat as he unloads his weight onto his plant foot. Although this is a fastball (the 2018 video is a breaking pitch), we’re seeing less movement overall, and a much more direct path to the ball once he initiates his swing. Because everything is cleaner, he’s able to coil up, keep his hands in, and explode towards the ball to send it the other way inside of yanking it to right field. As a result, he’s been more aggressive on pitches in the zone and making more contact overall. It’s not perfect, but significantly better.

First, movement (or lack thereof) of his bat as he goes to plant his front foot:




As opposed to 2018, you can see that his hands and his lower half are in sync. It’s beautiful. There’s still some movement in his hands, but we’re not asking Crawford to be perfect.


And next, hand movement as he goes into his swing:




It’s not easy to see his hands here, but in both respects, these are considerable improvements from last season, and it results in the aforementioned double to left field. The double is a home run in some parks, too.

This is all correlates with the following changes in batted ball profile:


GB% FB% LD% PU% Pull% Middle% Oppo%
2018 41.5 26.8 22.0 9.8 42.7 35.4 22.0
2019 34.8 20.7 35.9 8.7 33.7 37.0 29.3


All of this is good. For other players, you may want to see in increase in flyball percentage, but that’s not where Crawford thrives—at least not at this point in his career. We’ve seen a gigantic increase in line drive percentage, a decrease in pull percentage, and increases in balls hit the other way and up the middle. His flare/burner percentage has also increased from 23.2% to 37.0%, which tells me that he’s taking what’s given to him and dumping it into the shallow outfield for base hits. Some may view this as a bad thing, but—to use verbiage from Baseball Savant—it’s preferable to topping a ball, getting under it, or hitting it weakly.


Bottom Of The Barrel


Relatedly, if there’s one substantial criticism to be made of Crawford, it’s that he hasn’t hit the ball especially hard. This may be related to his approach. Let’s look at how he fares in a few relevant statistics, by percentile:

  • Barrels/PA%: 29th
  • Barrel/BBE: 31st
  • Max Exit Velo: 25th
  • Exit Velo, FB/LD: 4th

Clearly, he’s not exactly tearing the cover off of the ball—especially on flyballs and line drives. Although rather nitpicky, it is a very real aspect of his game that currently limits him as a player. Let’s remember, though, he still has plenty of time to develop some power—Crawford is just 24 years old. Ketel Marte is just now tapping into his power at age 25, and they’re similar in build. I’m not insinuating that Crawford is the player that Marte is—especially since their plate discipline profiles are different—but there was a time not long ago when John Sickels said that Marte “is not a home run hitter and never will be.” (Side note: This is not to dog on Sickels. I’m a huge fan of his work!) Sometimes, players simply mature, grow into their bodies, and fully identify mechanics that work for them. Sometimes it happens what feels like overnight, and sometimes it’s a slow progression. For most (and likely Crawford), it’s somewhere in between, and I do expect these numbers to improve over the course of this season.

So, sure, he’s not hitting barrels, but he there is one area in which he’s improving: sweet spot percentage. Sweet spot percentage is defined as balls hit between eight and 32 degrees—this is what Baseball Savant deems the optimal range of contact, in terms of launch angle.

Crawford’s rolling sweet spot percentage:



While it’s important to hit the ball hard, it’s also important at what angle the ball is coming off of the bat. In this way, Crawford checks one of two boxes.

Oh, and barrels aside, Crawford can still do this:




That’s a 96 mph four-seam fastball, up and away, off of Gerrit Cole. Although he appears to have missed his spot, Cole could do far worse than missing where he did. Regardless of pitch quality, Crawford displays his improved mechanics here and sends the ball over the fence.


For Mariners fans, you have to be delighted to see Crawford figure it out—he’s blossoming right before us. What’s maybe of equal importance is that the front office should be credited for targeting an underappreciated player and helping him actualize more of his potential, almost immediately. He’s already been showing improvements as a fielder since working with infielder-whisperer Perry Hill, but now he’s improved his contact skills to go with his pristine plate discipline. I’m eager to see how the league adjusts. Pitchers have recently started to pitch to him in the zone at a career low, and they’re increasingly starting to locate down and away—I expect more breaking and offspeed pitches to follow. With that said, the contact has come, and some power has accompanied it soon after. It remains to be seen if he’ll continue his current successes at the plate—especially in the power department—but don’t be surprised if he starts getting into balls and they start landing over the fence, especially as his body fills out. For now, consider me a full-fledged J.P. Crawford apologist.

(Photo by Stephen Hopson/Icon Sportswire)

(GIFs courtesy of Michael Ajeto and Max Posner)

Michael Ajeto

Michael writes about the Mariners at Lookout Landing, as well as here at Pitcher List. You can follow Michael on Twitter @dysthymikey, or you can not.

5 responses to “Going Deep: J.P. Crawford Made The Jean Segura Adjustment”

  1. theKraken says:

    The analytics department is the part of the organization that analyzes fundamentals? I think someone has something backwards. They certainly don’t deserve any credit for cleaning up his swing. if I was a team doing a complete meltdown I would throw out ambiguous references to what my analytics department was doing as well. If you are not actually trying to compete you may as well pretend that you are doing exciting work that is coincidental invisible. Smoke and mirrors. That overhaul and change to his approach is the same thing that everyone has done since forever.

    In the GIF breakdown you are contrasting a breaking ball with a fastball which is kind of like apples and oranges – I think the analysis is good, but you should choose similar pitches. He was all kinds of fooled on that CB and was not on the FBs. Everyone looks bad when they get fooled. There is also the reality that one swing just doesn’t mean anything. Everyone takes embarrassing and brilliant ones. Look at that first swing again – you can see the point at which he realizes that he guessed wrong and then it really falls apart – you call it movement, but that isn’t part of his swing, that is just him making an adjustment so he doesn’t flail (anymore than he has to) at the pitch. Pre-swing of course the guy hitting .200 with limited ABs doesn’t look settled or comfortable. When I analyze hitters I like to watch them take BP – that is closer to a vacuum whereas random game swings are nothing but variables. The nice swings are the ones where they hitter guesses right and none of the variables burn him. A good hitter can adapt better than one who can’t.

    As for real Crawford, I haven’t paid much real-life attention to him. I will try to get some looks so thanks for pointing out a potential breakout. Funny how many brakouts the Ms have this year. My theory is that the league is so far down in talent (more execution) that literally anyone with an opportunity can succeed, for a while at least if given the ABs. Its a good time to be a hitter. I think there are some good reasons to be skeptical about JP – his BABIP is nearly .400, if he isn’t hitting close to .300 then I don’t know if he is a good hitter. He doesn’t have a lot of power (I think) or run at all. I think it is a mistake to just look at the wRC+ or any one-size-fits-all metric. All you are really doing is measuring how well he fits that metric. If that ISO and BABIP slip a lot, which they should then he will be pretty average or worse pretty quick. Its weird to see his K rate and also call him extremely disciplined. If anything, I would point that out as the biggest red flag of sustainability – something isn’t right there. It has a Maikel Franco vibe where a player has one elite skill but the rest of it isn’t there. If I know the Mariners, they will trade him away and then he will have a huge breakout as they do with every other SS that they develop – Brad Miller, Chris Taylor, Ketel Marte haha its pretty crazy what they have gotten rid of… same group of people that you are patting on the back.

    On a side note, good to see sweet spot – I have never seen that before. We certainly need to get away from barrels and any progress at all will be worthwhile just to widen the scope of the analysis. I am not sure how different that is from LD% – it can’t be much but people overuse barrels. The de-coupling from well-known (non Amazon owned) rates and LA is super weird. That is sabermetrics though – rebrand what we already have and sell it as being even more relevant that what it is. Of course, an actual sweet spot (real world) has nothing to do with LA, but misleading labels is a huge part of the Statcast revolution. They pick well-known terms and arbitrarily attach them to Statcast measures… someone does at least.

    Lastly, in regard to Mr Sickles work – John would be smart and open-minded enough to understand juiced balls. There were projections based on reality… then they changed reality – more accurately the physics of reality. It’s not Statcast and data destroying short-term HR records – its MLB itself. Interesting that Statcast data comes along right around when MLB juices baseballs, no? MLB fought to deny is for years which makes it all that much fishier. Introducing those balls to AAA was the worst mistake they ever made – they can’t deny it any longer and they will have to address it at some point. Just calling it a big conspiracy was a nice strategy to deflect, but now with AAA on board the juice train they don’t have any outs left.

    • Michael Ajeto says:

      In terms of the GIF breakdown, I’d tend to agree. I noticed when I was halfway into it that the pitches were different, so yeah, good point. Although, I looked at a lot of video, so although it isn’t the best example. It is representative of his issues at the plate.

      As for the analytics department comment, I said that the front office targeted him — if you’d read the article I linked, you’d know that they did. Andy McKay and the hitting coaches put a ton of work into him in spring training, and it’s showing.

  2. WheelhouseWreck says:

    Good stuff! And not just cuz i snagged him in a league where I’m fairly hitter stacked. Maybe I’ll deal Bregman for an ace…not sure yet but i do need stable pitching and I know I’m not the only one this year

    • Michael Ajeto says:

      Yeah, sheesh, it’s been rough this year. Bregman should be able to land you something pretty.

  3. Brad R says:

    Great stuff. Sorta similar to the last commenter he (alongside Huira) were gonna be possible targets tonight for MI depth. I was a bit worries about his BABIP but since this is a points league, I’m ok with the lack of power if he can keep hitting singles (just means low ceiling bench guy)

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