With Zack Wheeler joining the Mets’ small army of pitchers on the disabled list, the team will turn to 23-year-old Chris Flexen tonight against the Padres. Unless you’re a Mets fan with a deep interest in prospects, there’s a good chance this is your first time hearing Flexen’s name. I’ll admit that I was unaware of him until a couple of days ago when I came across his name while formatting KATOH’s most recent top-100 list.

But despite his obscurity, Flexen has undeniably earned this opportunity with the way he’s pitched this season. He started the year on the DL after having a bone chip removed from his right knee, but has been utterly dominant since returning. In three High-A starts, he pitched to a 2.81 xFIP with a 25% strikeout rate. He was even better in Double-A, spinning a 2.43 xFIP thanks to a 29% strikeout rate.

It’s been a long slog for Flexen, who was originally drafted by the Mets in the 12th round way back in 2012. After a couple of lackluster seasons in the lower levels, he underwent Tommy John Surgery in 2014. He pitched decently in 2016, his first full year after the surgery, but did so with a sub-17% strikeout rate. There was little reason to suspect he was on the verge of a breakout in 2017.

Eric Longenhagen included Flexen in his preseason Mets list, but only in the “Honorable Mention” section. He saw him as being worse than a 40 FV — the equivalent of a spot starter or middle reliever.

He sits 91-94, touching 96, with an average curveball and fringe change. He has a big, sturdy, inning-eating frame but has already had a surgery, and there are scouts who’d like to see if the fastball plays consistently at 96 out of the ‘pen . Others think he’s more of an up-and-down starter.

Eric provided an updated scouting snippet last month.

He has been 92-96, flashing an above-average slider and throwing all four of his pitches for strikes.

Because of scouts’ pessimism, there’s a sizable gap between Flexen’s stats-only KATOH forecast and KATOH+, which incorporates his (lack of) preseason prospect rank. The stats-only version projects him for 5.6 WAR over his first six years, which is good for 66th overall and 13th among pitchers. But that forecast drops to a meager 2.8 WAR once the scouting data is layered in. KATOH+ sees him as a near-certain fringe-player.

And since it looks noticeably different, I also made a stats-only graph. This one gives him a much more realistic chance of racking up more than 4 WAR.

To put some faces to Flexen’s statistical profile, let’s generate some statistical comps. I calculated a Mahalanobis distance between Flexen’s 2017 numbers and every historical 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. 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 tough to know what to make of Flexen. While his small-sample 2017 numbers have been exceptional, he’s never pitched anywhere near this well before, nor was he ever seen as much of a prospect. But then again, this might simply be an instance of Flexen finally being healthy for the first time in at least three years. I look forward to watching tonight to see how he fares against big-league hitters.

With Dexter Fowler out of commission after suffering a wrist strain, the Cardinals have promoted top prospect Harrison Bader to take over center-field duties. Bader had been crushing Triple-A pitching to the tune of .297/.354/.517, though those numbers are inflated by the run environment of PCL. In his big-league debut last night, Bader doubled and scored the winning run.

Even after accounting for the effects of the PCL, Bader has hit for a healthy amount of power this year, belting 19 homers in 97 games. There’s more to Bader than his power, however. Eric Longenhagen rated him as a 60 runner, which parlays into good baserunning and center-field defense — Clay Davenport’s numbers consistently have him above average in center.

Bader profile isn’t all roses and sunshine, as his strikeout and walk rates both leave much to be desired. These metrics suggest he may have issues getting on base in the majors. Eric also voiced concerns about the prospect of Baders’ swing working against major-league pitching.

Bader has plus bat speed and some raw power, but it’s hard for him to utilize it in games because his swing is so flat and linear. He has to really adjust his lower half to move his barrel up and down in the hitting zone and, while this worked at Double-A, not everyone thinks it’s sustainable in the big leagues. Additionally, Bader has trouble seeing the ball against right-handed pitching, especially breaking balls, over the top of which he often swings. It’s more of a 40/45 hit/power profile which doesn’t play everyday in a corner, but Bader was an above-average runner for me in the Fall League and plus during the season for some scouts with whom I spoke, so some orgs think he can moonlight in center field.

No outlet has ranked Bader in their top 100, presumably for the reasons Eric laid out in his write-up. But my KATOH system disagrees with this assessment. My system pegs Bader for 5.7 WAR over his first six seasons by the stats-only method and 4.5 WAR by KATOH+, which incorporates his prospect ranking. Those marks place him 61st and 73rd, respectively, among prospects.

To put some faces to Bader’s statistical profile, let’s generate some statistical comps. I calculated a Mahalanobis distance between Bader’s 2017 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.

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.

Bader his flaws, but he also has a lot going for him. Most notably, he’s a 23-year-old who’s now succeeded at the highest level of the minor leagues. Sure, his numbers were helped by the PCL. But even if this year’s numbers are largely smoke and mirrors, Bader remains a speedy center fielder with power and passable defense. Those can be quite valuable.

With the trade deadline swiftly approaching, it’s time for some updated KATOH rankings. I know you’re not here to read about assumptions and caveats, so I’ll keep the non-list part of this article short and sweet.

• For each player, KATOH produces a WAR forecast for his first six years in the major leagues. There are drawbacks to scouting the stat line, but due to their objective nature, the projections here can be useful in identifying prospects who might be overlooked or overrated.
• KATOH+ incorporates Baseball America’s midseason top-100 list and Eric Longenhagen’s preseason FV grades for players excluded from BA’s list. Stats-only KATOH does not consider prospect rankings.
• These projections account only for minor-league stats. While I’ve done work with college players, I have not yet attempted to merge college and minor-league data. These projections also do not account for any major-league performance.
• All players with at least 200 minor-league plate appearances or batters faced in 2016 and/or 2017 were considered.
• This isn’t “Chris Mitchell’s Top 100 List,” and certainly not “FanGraphs’ Top 100 List.” This is simply the output from my far-from-perfect statistical model.

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Thoughtless and bad editor Carson Cistulli overlooked this post when Chris Mitchell submitted it on Friday afternoon. That’s the reason it’s appearing on Tuesday.

The Mariners and Cardinals completed one-to-one swap of outfielder Tyler O’Neill and lefty Marco Gonzales on Friday. As Dave Cameron has pointed out, this represented a case of the Mariners trading away future upside for some much-needed, immediate rotation depth. A move of that type is understandable given the state of the Mariners’ rotation and their position in the Wild Card race, but KATOH thinks the gap in value between these two prospects is quite large.

Below are the projections for the three players whom the White Sox receive. WAR figures account for the player’s first six major-league seasons. KATOH denotes the stats-only version of the projection system, while KATOH+ denotes the methodology that includes a player’s prospect rankings.

*****

Tyler O’Neill, OF (Profile)

KATOH: 7.1 WAR (34th overall)
KATOH+: 6.0 WAR (52nd overall)

O’Neill elevated his prospect stock last season, when he slashed .293/.374/.508 at the Double-A level. But he’s had a tougher time at Triple-A this season, hitting only .244/.328/.479. Part of that, however, has to do with playing in a park that’s tough on right-handed hitters. Eric Longenhagen gave him a 50 FV over the winter and listed him as an honorable mention on his top-100 list.

O’Neil is a three-true-outcomes prospect who’s homered, walked, or struck out in over 43% of his trips to the plate this year. His power is his biggest strength, as he’s belted a remarkable 75 homers since the start of the 2015 season while also kicking in 76 doubles and triples. But all that power comes with a lot of strikeouts, as evidenced by his 27% strikeout rate this year.

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Happy Rafael Devers Day!

The highly-touted 20-year-old is slated to make his big-league debut tonight, and will almost certainly provide Boston with a sizable upgrade at the hot corner. Devers slashed .300/.369/.575 at Double-A before hitting a cool .400/.447/.600 in a nine-game stint at Triple-A.

Devers’ biggest strength is his power. After putting up middling power numbers in years past, he smacked 20 homers and 20 doubles in the minors this year. Unlike many power hitters, Devers doesn’t strike out a ton — he’s kept his strikeout rate below 20% throughout his time in the minors.

Devers has quite an exceptional offensive profile, but it’s even more impressive when you consider he’s much more than his hitting. Not only does Devers play one of the more premium defensive positions, but he plays it quite well. He’s been three runs above average at third base this year by Clay Davenport’s numbers, and checked in at +19 (!) runs last year in High-A. Devers’ high-minors performance has been excellent across the board, which is all sorts of encouraging coming from a 20-year-old.

My KATOH system pegs him Devers 11.7 WAR over his first six seasons by the stats-only method and 15.3 WAR by KATOH+, which incorporates his Baseball America ranking. Those marks place him sixth and fourth, respectively, among prospects.

To put some faces to Devers’ statistical profile, let’s generate some statistical comps. I calculated a Mahalanobis distance between Devers’ 2017 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. 

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.

After they shipped Todd Frazier to the Yankees in exchange for prospects earlier this week, the White Sox replaced him on their roster with Yoan Moncada. Moncada was hitting a healthy .282/.377/.447 at Triple-A, highlighted by his 12 homers and 17 steals. He hits for average, hits for power, steals bases, and even draws walks. Very few players can hit like Moncada does while also providing value in the field and on the bases. That’s why he was a fixture at the top of midseason prospect lists this summer. Baseball America and Baseball Prospectus both ranked him No. 1, while Keith Law put him at No. 13.

But for all his strengths, Moncada has some weaknesses that we shouldn’t overlook. Most notably, he strikes out a bunch. Moncada’s struck out in over 28% of his trips to the plate this year. Though it’s been somewhat hidden by his high batting averages, Moncada has had a lot of trouble making contact against minor-league pitchers. This suggests he’ll have even more trouble doing so in the big leagues, which is exactly what happened in Boston last September when he struck out 12 times in 20 plate appearances.

There’s also the matter of Moncada’s defense. He’s primarily played second base since emigrating from Cuba, and the prognosis for minor-league second basemen isn’t great. The fact that he’s already been deemed “not a shortstop” is a knock against him in KATOH’s eyes. Furthermore, his defensive metrics at second base aren’t great. He’s been right around average there by Clay Davenport’s fielding data this year and was several ticks worse than average last year. This suggests he may not be a defensive asset in the infield.

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The Yankees plugged holes at first base and in the bullpen last night when they traded for Todd Frazier, David Robertson, and Tommy Kahnle. In exchange, they sent Tyler Clippard to the White Sox, along with prospects Blake Rutherford, Ian Clarkin, and Tito Polo.

Below are the projections for the three players whom the White Sox receive. WAR figures account for the player’s first six major-league seasons. KATOH denotes the stats-only version of the projection system, while KATOH+ denotes the methodology that includes a player’s prospect rankings.

Blake Rutherford, OF (Profile)

KATOH: 1.0 WAR
KATOH+: 2.7 WAR

The Yankees took Rutherford 18th overall in last year’s draft out of high school. He’s spent his first professional season at the Low-A level, hitting .281/.342/.391. Altogether, he’s been a bit underwhelming, especially since his performance has been helped by a .341 BABIP. His 18% strikeout rate isn’t bad, per se, but it’s a little high considering the low level of competition he’s faced, especially given his lack of power. Defensively, Clay Davenport has him as a -7 defender in just 36 games in center this year, although that sample is obviously tiny. Additionally, Rutherford is already 20 years old, making him a year older than most 2016 high-school draftees.

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The Diamondbacks have added a big bat to the middle of their lineup, swinging a trade for slugging outfielder J.D. Martinez. In exchange for Martinez’s services, the Arizona sent Detroit a trio of minor-league infielders: Dawel Lugo, Sergio Alcantara and Jose King. I do not have a KATOH projection for Jose King, as all but 13 of his professional games have taken place in the Dominican. However, he signed for a mere $75,000 and didn’t even make the honorable-mention section of Eric Longenhagen’s Diamondbacks list. That tells you about all you need to know: he’s a low-probability lottery ticket.

Below are the projections for the other two players whom the Tigers receive. WAR figures account for the player’s first six major-league seasons. KATOH denotes the stats-only version of the projection system, while KATOH+ denotes the methodology that includes a player’s prospect rankings.

Dawel Lugo, 3B (Profile)

KATOH: 2.4 WAR
KATOH+: 1.3 WAR

Of the prospects headed to the Tigers, Lugo is the closest to the big leagues and is also the most promising. He’s spent all of 2017 at the Double-A level, where he’s hit a respectable .282/.325/.426. He hit a more impressive .311/.339/.492 last year between High-A and Double-A. Lugo makes a lot of contact while also hitting for a fair amount of power. Players who can do both of those things from a semi-premium position aren’t all that common.

That’s about where Lugo’s appeal ends, however. He rarely walks and is a non-factor on the basepaths. Despite having played shortstop, Lugo’s defense per Clay Davenport’s numbers place him a tick below-average at third, which jibes with Eric’s 40/45 fielding grade. Lugo is still just 22, but as someone who signed out of the Dominican several years ago, he’s unlikely to make any wholesale improvements at this point. Still, someone with his offensive skill set who can play a passable third base could be of some use in the near future.

To put some faces to Lugo’s statistical profile, let’s generate some statistical comps. I calculated a Mahalanobis distance between Lugo’s Double-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.

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The first domino of the 2017 trade deadline fell yesterday, as the Cubs swung a deal with their crosstown rivals for Jose Quintana. Quintana has been one of the best pitchers in baseball the past few years, so he understandably brought back a substantial prospect haul. The Cubs coughed up top prospects Eloy Jimenez and Dylan Cease in the deal. Both are possess enticing upside, but neither has put up dominant numbers in the low minors. As a result, KATOH is relatively low on both.

A couple of lower-tier prospects, Matt Rose and Bryant Flete, were also included in the deal.

Below are the projections for the four players whom the White Sox receive. WAR figures account for the player’s first six major-league seasons. KATOH denotes the stats-only version of the projection system, while KATOH+ denotes the methodology that includes a player’s prospect rankings.

*****

Eloy Jimenez, LF (Profile)

KATOH: 4.7 WAR (87th overall)
KATOH+: 11.5 WAR (12th overall)

Jimenez is undoubtedly the centerpiece in this deal. The 20-year-old Dominican left fielder ranked fifth and eighth on Baseball America’s and Baseball Prospectus’s lists, respectively. After missing the season’s first few weeks with a shoulder injury, Jimenez has hit .271/.351/.490 at High-A. He hit a loud .329/.369/.532 in Low-A last season. Over the winter, Eric Longenhagen praised Jimenez’s power potential, ranking him No. 15 on his preseason top-100 list.

He’s got 70 raw power right now, flicking lasers over the left-field wall with ease during BP and stumbling into wall-scraping homers he barely squares up in games. I think he’s going to have elite power in his mid-20s and there’s solid feel for contact here, too.

My KATOH system is a tad skeptical of Jimenez due to his near-complete lack of defensive value and 20% strikeout rate in A-ball. Still, it sees a good deal of promise in his power and youth. For someone Jimenez’s age, 24 homers in 154 games at A-ball is impressive, regardless of what position he plays.

To put some faces to Jimenez’s statistical profile, let’s generate some statistical comps. I calculated a Mahalanobis distance between Jimenez’s A-ball 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.

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Over the weekend, the Twins called up speedy center fielder Zach Granite from Triple-A. Granite is a KATOH darling who made my preseason 2017 All-KATOH Team and has been featured regularly on the Fringe Five. Granite’s a stats-over-scouts guy through and through.

I first became aware of Granite around this time last year, when he ranked very highly on KATOH’s midseason top-100 list. At the time, there was little to his profile aside from elite contact and speed. He stole an outrageous 56 bases and played elite defense in center, while also running a strikeout rate in the single-digits. Despite his extreme contact, he only managed to hit a respectable-but-punchless .295/.347/.382.

He’s ramped up his hitting this year. In 59 games at the Triple-A level, he slashed .360/.412/.492, including a .446/.503/.619 tear over his last 36 games. His stolen bases and single-digit strikeout rate remain, but he appears to be driving the ball a bit more than he did in the past. His ISO has spiked to a not-quite-punchless .131, while his BABIP has jumped to .394. Twenty-one extra-base hits in 59 games is respectable, even if that total has been aided by his speed.

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