Adalberto Mejia’s turned in a 2.81 ERA in 18 starts between Double-A and Triple-A this year. His ERA was helped by a low BABIP, especially at the Double-A level. But even so, his 24% strikeout and 6% walk rates signify a solid pitcher. Although he’s pitched professionally since 2011, Mejia didn’t turn 23 until last month, which makes his high-minors dominance all the more impressive. Mejia’s numbers where significantly less impressive in a limited sample last season, but were still encouraging from a 22-year-old at Double-A.

My newly revamped KATOH projection system rates Mejia as a good, but not elite, pitching prospect. It projects him for 3.4 WAR over his first six seasons by the traditional method. Incorporating Baseball America rankings bumps Mejia’s forecast up to 3.9 WAR, which places him 94th overall among all prospects. To help you visualize what KATOH’s projection entails, here is a probability density function showing KATOH+’s projected distribution of outcomes for Mejia’s first six seasons in the major leagues.

To put some faces to Mejia’s statistical profile, let’s go ahead and generate some statistical comps for the southpaw. I calculated a Mahalanobis distance between Mejia’s Double-A and Triple-A performance this year and every season at those levels since 1991 in which a pitcher recorded at least 350 batters faced. 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.

Newly acquired Minnesota Twins LHP Adalberto Mejia doesn’t have the fire-breathing stuff that many of his fellow 2016 Futures Game participants do, but he combines a deep, usable repertoire with advanced sequencing to accrue outs — and was arguably the most advanced arm in the 2015 Arizona Fall League.

Mejia signed with San Francisco early in 2011 for $350,000 and dominated the Dominican Summer League later that year. He was sent directly to a full-season affiliate for his stateside debut the next year as a 19-year-old. In July of 2013, when the Giants needed an arm for a spot start at Triple-A, they were comfortable enough to let Mejia, then 20 years of age, make that start. Over 18 starts between Double and Triple-A this season, Mejia has a 2.81 ERA.

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Kyle Gibson starts tonight against Baltimore. He pitched his best game of the season on Friday. The Minnesota Twins right-hander gave up a home run to the first batter he faced, but that was the lone blemish in a 2-1 win. Matching up against the Red Sox at Fenway Park, Gibson fanned six and allowed just three base-runners over eight innings of work.

He mixed his pitches proficiently. Per Brooks Baseball, the 29-year-old sinker-baller threw 37 two-seamers, 24 sliders, 18 changeups, nine curveballs and eight four-seamers. His sequencing induced a 38.8% swing rate on pitches outside the zone (O-Swing%) against one of baseball’s most patient lineups.

Gibson, who is suffering through a subpar year, discussed the game and his overall pitch usage the following day.

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Gibson on his July 22 outing: “The homer to [Mookie] Betts was on a four-seamer. There are times I’ll throw a first-pitch four-seamer to righties, but it’s usually all sinkers. Most of the four-seamers I throw are in to lefties and I haven’t been beaten too many times on that. One that comes to mind is a Jackie Bradley home run in our ballpark [on June 11]. It’s a pitch I’m normally trying to elevate and throw for effect.

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Most All-Stars weren’t born into baseball this way. Most of them had to alter their approach, or their mechanics, in order to find that a-ha moment. They threw a pitch differently, or decided to pull the ball more, or changed their swing, and then found a run of sustained success that put them in the All-Star game that’s being played tonight.

So, given fairly fettered access to the All-Stars from both leagues, that was the question I posed: what was the big adjustment, mechanical or approach-wise, that brought you to this podium today?

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Ever since Eric Byrnes used a computer to help umpire an independent-league baseball game last year, and then Brian Kenny took up the mantle of #RobotUmpsNow on the MLB Network, I’ve been fascinated with the idea that robot umpires will soon call strike zones in baseball. The more I talk to players about it, though, the more I doubt that it’s an eventuality. Because the players, well, the players are going to hate it.

I can’t speak for all players, obviously. I haven’t talked to all of them. But I’ve talked to plenty on both sides, even ones I can’t quote here, and the biggest endorsement I could get was a tepid version of “It’s going to happen.”

So instead of asking each player what they thought about robot umpires, I changed the question a bit. Instead, I asked pitchers, catchers, and hitters, “Who will hate robot umps the most?”

The short answer? Everyone. The long answer? Much more interesting.

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As May came to an end, I made my way cautiously over to Brian Dozier, who was slashing .202/.294/.329 at the time. Approaching a player in the midst of a slump can go one of two ways — you can either get Brandon Moss and complete honesty about what that battle is like, or you get frustrated non-answers tinged with anger.

Dozier was more of the former — even though his numbers at the time were some of the worst of his career, particularly the ones that concerned balls in play. He didn’t mind, though, since he had a simple solution on which he was working that day. The results were immediate.

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Brian Duensing’s baseball future is tenuous. The 33-year-old southpaw is currently an Oriole, but his time in Baltimore could be short. Signed off the scrap heap a few weeks ago, he’s failed to impress in five outings. He could easily be the odd man out the next time a roster move is made.

Duensing was cast aside by his long-time team over the winter. A member of the Minnesota organization since being drafted out of the University of Nebraska in 2005, Duensing hit the open market when the Twins “opted to go in another direction.” It didn’t come as a shock. He’s never been overpowering, and last year he was more underwhelming than ever. His ERA was 4.25 and his 4.4 strikeout rate was a career low.

Free agency didn’t go as he’d hoped. Quality offers weren’t forthcoming, and opt-out clauses have subsequently become a meaningful part of his life. There’s a chance he will remain an Oriole, but he could just as easily be elsewhere in the not-too-distant future. He might be wearing a new uniform in a new city. He might be at his home in Omaha, with his wife at his side and three toddlers in tow.

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Duensing on first-time free agency and his future: “This was the first time I was a free agent. I was somewhat excited to see what would happen, but it didn’t really pan out like I’d hoped. I ended up signing with Kansas City, a non-roster minor-league deal, and then didn’t make the team out of spring training. I began the season in Omaha. That’s where I’m from, so I was able to live at home with the wife and the kids.

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“I’ll tell you one thing I don’t like,” Sean Doolittle said as he grabbed his glove and jogged his way out of the clubhouse for stretch. “The hitters get to talk to the umpire and I don’t.”

You see it all the time, even if many hitters don’t want to talk about their conversations with the umpire. Muttering, head-shaking, even outright questions — “where was that?”. Occasionally you’ll even see demonstrative complaints that don’t result in the hitter being tossed, but do result in some aggressive stares and good old baseball posturing.

On the mound, it seems like the stakes are higher. Pitchers might be allowed a stare or aggressive body language, but if it escalates too quickly… Is Doolittle right? Do pitchers do get less leeway before they are warned or ejected? Or get to say less? They definitely don’t get to talk in close quarters with the person determining the balls and strikes, especially in the American League.

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Generally, the theory is that even top prospects bust. Byron Buxton is the toppest of top prospects, but even that distinction can’t protect him from failure of one kind or another. Exploring that theory is much more difficult when you’re the player himself. Or the writer asking that player about those expectations and the difficulties he’s been having so far. “You’re going to have a stamp on you wherever you are, but I try to put it to the side,” the struggling Twin said recently before a game with the Athletics. It’s hard not to empathize.

The theory with Buxton is that the tools are there but that he needs to make an adjustment to major-league pitching. It’s looked bad, but the talent is in there.

In 195 major-league plate appearances so far, Buxton has struck out 36% of the time and walked just 4% of the time, for a 32-point differential between his strikeout and walk rates. It’s a toxic combination. And rare. Consider: among 106 top-10 prospects since 1990, only Javier Baez has recorded a worse strikeout- minus walk-rate differential in his first 200 plate appearances.

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Yesterday, we tackled the best final seasons for pitchers. Today, let’s tackle the position players, so we can get to the heart of the question of just how good David Ortiz needs to be to crack one of these lists. The rules and breakdowns are the same as before, so I would encourage you to read yesterday’s post to peep those. Once again, big ups to Jeff Zimmerman for data help.

30-39 WAR

Best Final Season, Position Players with 30-39 WAR

Player	Final Season	Age	WAR	Career WAR
Roy Cullenbine	1947	33	4.4	33.8
Chick Stahl	1906	33	3.7	33.1
Tony Cuccinello	1945	37	3.0	32.2
Gil McDougald	1960	32	2.8	39.7
Joe Adcock	1966	38	2.5	34.2
Elbie Fletcher	1949	33	2.4	30.7

The guys on this list are definitely not household names, but there are some interesting, if also tragic, stories here. Let’s deal with the tragic first. There are six players here because one of them, Chick Stahl, committed suicide during spring training of the 1907 season. He had been named the Americans’ (Red Sox) player/manager over the winter, and something drove him to take his own life. This was surely a big loss for the team, as they had been counting on him to help lead them. He was the fifth-best hitter in the game just a couple years earlier in 1904.

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