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On Sunday, Justin Verlander played the stopper, withstanding a trio of homers by the A’s to grind out 5.1 unspectacular but much needed innings to help the slumping Astros regain sole possession of first place atop the AL West. It certainly wasn’t an outing fit for hanging in a museum, but the fact that it was Verlander’s 200th career victory did significantly increase the likelihood that his own likeness will hang in Cooperstown one day. While only three out of the 12 starting pitchers the BBWAA has elected since 1992 finished with fewer than 300 wins (2011 honoree Bert Blyleven plus 2015 honorees Pedro Martinez and John Smoltz), only one starter with fewer than 200 wins has been elected since 1956, namely Sandy Koufax (1972).

At the moment, Verlander, Bartolo Colon (247 wins), and CC Sabathia (244) are the only active pitchers with at least 200 wins. Zack Greinke (184) is about a year away from the mark, while Jon Lester (172), Félix Hernández (168), Max Scherzer (157), Cole Hamels (155), and Clayton Kershaw (150) will need several years. As for 300 wins, who knows when we’ll see another. The careers of both the 45-year-old Colon and the 38-year-old Sabathia are on their last legs, almost literally. For as iconic as Colon is, he’s also a replacement-level pitcher at this point. Sabathia, though still effective, has mulled retirement, and his arthritic right knee, which requires regular injections for maintenance, recently drove him to the disabled list yet again.

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It’s probably fair to say that batting average, as a shorthand for the quality of a hitter, has lost a bit of luster over the past decade or two as the public has become acquainted with metrics that correlate more strongly with scoring runs and winning games. That said, for a player to hit safely in 40% of his at-bats at any professional level is still incredibly rare and worthy of consideration.

Even if he weren’t to hit .400 this year, Vladimir Guerrero Jr. would still be worthy of consideration. As the son of a Hall of Famer, as a 19-year-old who has already reached Triple-A, there’s plenty that merits attention. But he’s also batting .389 in the middle of August, which means that Guerrero the Younger has a shot at a historic season.

Over at MLB.com, Jim Callis went through the list of minor leaguers who have hit .400 in a season. It’s not long. Back in 1999, Erubiel Durazo was a 25-year-old playing in Arizona’s system after a few years in the Mexican League. He hit .404 in 409 plate appearances between Double-A and Triple-A before his callup to the majors. He hit .329 for the Diamondbacks, putting his average at .381 for the full season. Back in 1961, Aaron Pointer hit .401, but almost all of that time was spent in Class-D, which was low in the stratosphere of minor-league affiliates — sitting below not only Triple-A, Double-A, and Single-A, but also Class-B and -C. Given the state of the minor leagues before the 1960s, it wouldn’t be unfair to say that the last time a a player hit .400 facing a reasonably high level of competition was Ted Williams in 1941, when he hit .406 on the season.

Guerrero missed time earlier in the year with a knee injury and has come to bat just 351 times this season. If he plays out the minor-league season and starts 13 of 15 game,s averaging 4.3 plate appearances per game, he’s only going to end up with around 407 plate appearances, which isn’t quite a full season. Assuming 3.1 PA per game over 136 minor-league games, one arrives at 422 PA as the standard for the high minors. Even if the Blue Jays brought Guerrero to the big leagues — more on that later — and gave him 20 starts, he’d still end up at roughly 493 plate appearances, just short of the 502 needed to qualify for the MLB batting title.

To determine Guerrero’s chances at hitting .400 in the minor league season, we have to approximate Guerrero’s talent level against minor leaguers. He has a .389 total batting average between Double-A and Triple-A with a .339 average in only 71 Triple-A plate appearances. With 56 presumed plate appearances left in the minor-league season, we can expect him to take six walks, which would be consistent with his 10% walk rate this season.

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The Mariners lost two of three to the Dodgers over the weekend. It wouldn’t be fair to say the series was an accurate representation of the Mariners’ season, but it works as a convenient caricature. On Friday, the Mariners lost to the Dodgers by ten. On Sunday, the Mariners lost to the Dodgers by eleven. On Saturday, the Mariners beat the Dodgers, by one, in the tenth inning, on a walk-off balk. The Mariners avoided a sweep, and, indeed, the Mariners actually still have a better record than the Dodgers do. Over the three games, though, the Mariners were outscored by a margin of 27-7. Sunday was the Mariners’ worst loss of the year.

It’s hardly new information that the Mariners’ winning percentage and their run differential don’t exactly match up. This has been true for a matter of months, and it partly helps to explain why the AL West is as close as it is. But before we all just collectively get used to something, we should take a step back so we can reexamine precisely what’s been going on. Although the Mariners have slipped out of playoff position, they’re still within striking distance of both the A’s and the Astros. The Mariners are 3.5 back in the wild-card hunt, despite a run differential of -42. The Rays are 7.5 back of the Mariners, with a run differential of +10. The Angels are 8.5 back of the Mariners, with a run differential of +39. The Twins are 11 back of the Mariners, with a run differential of -22. Every year, there are run differential overperformers and underperformers. Yet this is far more extreme than is typical.

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

Mark Vientos, 3B, New York Mets
Level: Appy   Age: 18   Org Rank: 7   FV: 45+
Line: 3-for-3, 2B, BB

Notes
The Mets have made effectual changes to Mark Vientos’s swing since he signed. His stance has opened up and his hands set up in a way that has enabled him to lift the ball better than he did in high school, especially pitches on the inner half. His hands are more alive and powerful than they were a year ago, and Vientos has launched balls out the other way even when he doesn’t fully square them up. His size/build might eventually cause a tumble down the defensive spectrum (he’s been projected off of shortstop to, at least, third base since he was a high-school underclassman), which would mean power alone won’t be enough to enable him to profile. His early-career contact rates are positive, especially considering Vientos doesn’t turn 19 until December.

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There are a lot of things going right in Oakland these days. For one thing, there are early indications that a red-hot rental and home-ownership market might finally be cooling off, even if only slightly (and very tentatively), thereby bringing four walls and a roof somewhat closer to reach for hundreds of thousands of ordinary Americans in the Bay Area. For another, the unemployment rate continues to drop (although wage growth is persistently and irritatingly slow to rise). And for a third, the Oakland Athletics have been the best team in baseball (west of Jersey Street) for over a month.

For a team to go 22-8 over any stretch, as the A’s have just done since July 10th, when they were last 10 games back of the Astros, requires a lot of things to go right. It requires Tony Sipp to hang a slider to Matt Olson. It requires a sweep of Texas on the road. It requires, in short, a little bit of that fairy dust that seems to have been scattered around the HoHo Coliseum since the days when Scott Hatteberg and Jonah Hill wandered those green fields — and the A’s have had that and all these things. But it also requires a lights-out bullpen, which the A’s have manifestly also had in recent days, and it’s this feature of the club’s recent experience on which I’d like to focus for a moment, because it wasn’t clear at the beginning of the season that this level of bullpen success was something the A’s would achieve or even necessarily aspire to.

The 2017 edition of the Oakland bullpen mostly sucked. By FIP (4.44), it was the ninth-worst in the game, by ERA (4.57) the sixth-worst, and by WPA, which is as close a measure as you can get to answering the question “was this bullpen good when it counted?” it was rock-bottom — the very worst in the game. If all you knew about the 2018 edition of the A’s pen is that it would no longer include Ryan Madson (who recorded a 2.06 ERA last year), you might project that it would take a step backwards this year, even after accounting for the winter additions of xwOBA darlings Ryan Buchter, Chris Hatcher, and Yusmeiro Petit in a busy offseason for Billy Beane.

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Houston, you have a problem. Less than two weeks ago, I suggested that the battle between the A’s and Mariners for the second AL Wild Card spot was “practically the last race standing in the Junior Circuit.” At the time, the A’s — who had won 33 out of their last 44 games — were still 5.5 games behind the Astros, who themselves had rebounded from a five-game losing streak (July 25-30) to win six out of seven against the Mariners, Dodgers, and Giants. A change in the pecking order atop the AL West appeared unlikely; at the time, our playoff odds gave Oakland just a 1.0% chance of winning the division.

Since then, the Astros have lost seven out of nine to the Mariners, Rockies, and A’s, with Saturday’s 7-1 loss to Oakland knocking the two teams into a tie and marking the first time June 13 that the Astros didn’t have sole possession of first. Though they regained it with Sunday’s 9-4 win (Justin Verlander’s 200th, a topic I’ll address in an upcoming post), Houston now owns a 7-8 record in August, an 11-14 since the All-Star break, and 20-19 since July 1. Over all of those stretches, they’ve outscored their opponents (177-148 for the longest one), and they still own the AL’s second-best run differential (+200), but the defending world champions have nonetheless frittered away their advantage. They’re still the overwhelming favorites in the division, but even after Sunday’s loss, the A’s odds are up to 9.6%; in the season-to-date version, based upon this year’s stats instead of our depth-chart projections, they’re up to 25.6%.

Perhaps most disconcertingly, the Astros are 10-15 against teams .500 or better since the start of July. They’ve fattened up by going a combined 8-1 against the White Sox, Tigers, and Giants, but lost three of five to the Rangers. Of their eight other series in that span, they’ve won just three (over the Angels, Dodgers and Mariners), lost three (two to the A’s, one to the Mariners), and split two (both against the Rockies). Overall, they’re just 37-36 against teams with records .500 or better, which is better than the A’s (31-39) but worse than the Mariners (38-35), and miles behind the Red Sox (37-22) and Yankees (36-24). Against those four teams, they’re a combined 19-20 this year; throw in the Indians (4-3) and they’ve played just .500 ball against the collection of teams they’ll have to beat in order to return to the World Series.

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