The St. Louis Cardinals recalled top prospect Alex Reyes yesterday and, a few hours later, the hard-throwing right-hander recorded his major-league debut, striking out one in a clean inning of relief work (box).

The book on Reyes is that his stuff is off the charts, but his control and command leave something to be desired. His numbers paint this picture vividly. His top-notch stuff enables him to miss a lot of bats, resulting in nearly unmatched strikeout rates the past couple of years. Meanwhile, his lackluster command has resulted in a concerning number of walks.

All else being equal, you’d prefer to have a pitcher that doesn’t have iffy command and an ugly walk rate. But all else isn’t equal with Reyes. His ability to generate strikeouts, especially at such a young age, is a huge point in his favor. I yanked some of those words from my recent Tyler Glasnow piece, but I’m recycling them here since they’re equally applicable to Reyes.

My KATOH projection system adores Reyes. It projects him for 7.6 WAR over his first six seasons by the traditional method and 12.6 WAR by the method that integrates Baseball America’s rankings. Reyes placed 18th and seventh overall, respectively, on KATOH’s recent top-100 lists. Among pitchers, though, he was third and first. KATOH’s lists tend to be relatively hitter-heavy — likely due to some combination of pitchers’ attrition rates and the fact that KATOH does not directly quantify “stuff.” But in terms of pitching prospects, scouting-infused KATOH thinks Reyes is the best one on the planet.

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Don’t feel bad if you somehow missed Joe Musgrove getting called up to the Astros this past Monday. After all, only like a billion other transactions took place that day, many of which involved established big leaguers and/or prospects more highly touted than Musgrove. But now that the deadline-related madness has come and gone, I’d like to direct your attention to Mr. Musgrove. He’ll be joining the Astros’ rotation this Sunday in place of the injured Lance McCullers, and there’s reason to think he’ll be a very good pitcher.

Two years ago, Musgrove wasn’t on anyone’s prospect radar. Though he was drafted way back in 2011, it took him until 2014 to make it out of Rookie ball — and until 2015 to make it into the full-season levels. But when finally given the opportunity to last year, he broke out in a big way. He shot from Low-A to Double-A, putting up a dazzling 1.88 ERA in just over 100 innings. Perhaps even more impressive were his strikeout and walk numbers: he struck out 99, while walking only eight, giving him rates of 25% and 2%, respectively.

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In the table below, you’ll find a treasure trove of information pertaining to the prospect-y players who changed hands this trade deadline. There were 47 of them in all. The “KATOH” and “KATOH+” columns refer to each player’s projected WAR forecast for the first six years of his major-league career, as evaluated by my newly updated KATOH system. KATOH denotes WAR forecast for first six years of player’s major-league career. KATOH+ uses similar methodology with consideration also for Baseball America’s rankings. The right-most column refers to lead prospect analyst Eric Longenhagen’s scouting grades, which should serve as something of a sanity check for my admittedly flawed projections.

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In case you hadn’t heard, a lot went down yesterday. Here are the prospects who changed teams on deadline day, as evaluated by my newly updated KATOH system. KATOH denotes WAR forecast for first six years of player’s major-league career. KATOH+ uses similar methodology with consideration also for Baseball America’s rankings.

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The Jonathan Lucroy Trade

Lewis Brinson, OF, Milwaukee

KATOH: 7.7 WAR
KATOH+: 9.9 WAR

Brinson posted some terrible numbers in the low minors, but he’s gotten progressively better the past few years, especially in the strikeout department. His 20% strikeout rate from last year was still a bit high, but not alarmingly so. With 31 extra-base hits and 10 steals to his name this year, Brinson has shown a tantalizing power/speed combination.

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A bevy of trades went down over the weekend, as this year’s trade deadline-season entered into full swing. Here are the prospects who changed teams the last couple of days, as evaluated by my newly updated KATOH system. KATOH denotes WAR forecast for first six years of player’s major-league career. KATOH+ uses similar methodology with consideration also for Baseball America’s rankings.

The Andrew Miller Trade

Clint Frazier, OF, New York (AL)

KATOH: 2.7 WAR
KATOH+: 4.7 WAR

Frazier had been promoted to Triple-A a week ago after slashing a strong .276/.356/.469 with 13 steals at Double-A this year. He pairs a high walk rate with decent power and speed, making him one of the most promising offensive prospects in baseball. Despite possessing average speed, Frazier plays mostly the corner-outfield spots these days, and hasn’t graded out particularly well there defensively. This suggests most of his big-league value will come from his hitting. Still, considering he’s a 21-year-old who’s already mastered Double-A, his future looks bright.

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You’ve undoubtedly heard about the Chapman blockbuster by now. Yesterday, lead prospect analyst Eric Longenhagen gave his take on the prospects involved. Below, I outline what my newly revamped KATOH projection system thinks about the youngsters headed to the Yankees. I also go on to compare that group to the group the Yankees sent to Cincinnati last December in exchange for Chapman’s services.

Note that I’ve included two types of KATOH projection. KATOH denotes the newest iteration of my projection system, outlined yesterday. KATOH+ denotes a version of that same thing which also accounts for Baseball America’s prospect rankings.

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Gleyber Torres, SS (Profile)

KATOH Projection: 5.6 WAR
KATOH+ Projection: 7.1 WAR

Although he’s just 19, Torres has been one of the more productive hitters in High-A this year. The Venezuelan shortstop is slashing .275/.359/.433 on the year, with an impressive nine homers and 19 steals. In addition to his offensive exploits, Torres plays an uber-premium position and plays it well.

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A mere 13 months ago, the Houston Astros selected Alex Bregman with the second pick in the amateur draft. Tonight, he’ll suit up for the Astros, after he gave Houston no choice but to call him up to the show. The 22-year-old hit .311/.412/.589 in the minors this year, including a .356/.387/.685 showing during his 17-game pit stop at Triple-A. Last season, his junior one at LSU, Bergman slashed .323/.412/.535 and, unsurprisingly, had little issue adapting to life in the pros. He closed out his draft year by hitting a strong .290/.358/.408 across two levels of A-ball.

Bregman pairs exceptional contact ability with ample power and a good walk rate, making him an all-around offensive threat. Bregman owns a minuscule 10% strikeout rate as a professional, yet has still managed a .200 ISO. Very few hitters possess Bregman’s combination of contact and power.

As if that weren’t enough, Bregman also provides value through means other than his hitting. The Astros have given him time at several positions this year in anticipation of his promotion, but he’s a shortstop by trade. That suggests he could be a fine defender at just about any place further down the defensive spectrum. He’s also swiped 20 bases in his year as a professional player, indicating good (or, at least, usable) speed.

As you probably imagined, my newly re-vamped KATOH system is head-over-heels for Bregman. He’s easily the top prospect in the land according to my math. Both KATOH (which considers stats only) and KATOH+ (which also incorporates prospect ranks) peg him for more than 17 WAR over his first six years in the big leagues.

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Back in January, I made some tweaks to my KATOH projection system, and have been using that updated model for the past several months. That model was unquestionably better than the previous versions, but it left me unsatisfied. While it addressed many of the flaws from previous iterations, there was still a lot of information it wasn’t taking into account.

I’ve been plugging away behind the scenes, and finally have a new version KATOH to share with the world. In what follows, you’ll find some detail on the new model, including its notable updates. I’ll be using this model in all of my prospect analysis from this point forward. Below, you’ll find a quick run-through of the notable tweaks, followed by an updated top-100 list.

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Added Features

Choosing projection window based on level, rather than age

In my previous model, I projected out based on a player’s age. If a player were 22, I projected him through age 28; If he were 24, I projected through age 30. This resulted in KATOH undervaluing players who were old for their level. The goal of KATOH is to predict the value a player will generate during his six-plus years of team control. By projecting a 22-year-old through age 28, KATOH failed to capture some of that value in cases where the 22-year-old was still in A-ball.

This time around, I chose my windows based on level, rather than age. I projected the next six seasons for players in Triple-A. I did the next seven for players in Double-A, eight for A-ballers, and nine for Rookie ballers.

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Less than a month ago, the Washington Nationals called up top prospect Lucas Giolito, with the hopes that he’d fill a hole in their rotation. However, as often happens with promising young pitchers, Giolito looked a bit overmatched in his first taste of the big leagues. He recorded more walks than strikeouts in his two starts with Washington, and was subsequently sent back to the minors to further refine his breaking stuff. Giolito will surely be back sooner rather than later, and still appears to have a bright future ahead of him. For now, though, the Nationals are turning to another electric young arm: hard-throwing 22-year-old Reynaldo Lopez debuts tonight against the Dodgers.

Lopez was signed out of the Dominican back in 2012, and his stuff has landed him on top-100 prospect lists for a couple of years now. But up until this season, he his minor-league performance hadn’t quite matched up with his stuff for any extended period. He spent the 2015 season in the High-A Carolina League, where he posted a mediocre 4.09 ERA. His peripherals suggest he pitched much better than that, but his 23% strikeout rate still underwhelmed.

He opened 2016 at the Double-A level, and soon began missing bats at a rate commensurate with his stuff. His 30% strikeout rate is tops among qualified Double-A pitchers this year. He also managed to keep his walk rate under 8%. Though he wasn’t super sharp in his two most recent starts at the Triple-A level, the body of Lopez’s 2016 campaign bodes well for his future in the bigs.

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Almost right after after treating us to Tyler Glasnow day, the Pirates are giving us another promising debutante to fuss over. First base prospect Josh Bell will debut for Pittsburgh in tonight’s game against the Cubs. Bell crushed Triple-A pitching this year to the tune of .324/.407/.535.

Bell posted a healthy .212 ISO in Triple-A this year, but in years past, he’s hit for an underwhelming amount of power — especially for a 6-foot-4 first baseman. Between 2014 and 2015 combined, he managed just 16 homers, and didn’t exactly compensate with loads of doubles and triples. Instead, he made lots of contact, which resulted in loads of singles. Read the rest of this entry »