In batted-ball velocity numbers, we’ve got a new toy. It’s hard to know exactly how to use it, as it goes with many new statistical toys. Without even a full year of sample size, we have no idea how accurate the data coming in is, how sticky batted-ball velocity is year to year, or how much of a skill it is. Even worse, the data is incomplete — velocity without angle is somewhat useless, and the angle that’s coming through is only for home runs.

Is there a short-term fix? Is there a way to combine batted-ball velocity with existing stats to make it useful in the short term? I think there might be, and I think the stories of Xander Bogaerts and Adrian Beltre might help us find this patch.

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It’s no secret that the Washington Nationals have fallen short of expectations this season. At 62-61, the unanimous NL East favorites from the preseason sit 5.5 games behind the Mets with a discouraging 19% chance of winning the NL East. Things have been particularly ugly of late, as the Nats have won just 11 of their last 30 games.

As Dave Cameron pointed out last week, several of the biggest culprits for the team’s struggles are members of the team’s offensive core. Anthony Rendon and Ryan Zimmerman have been bad. Jayson Werth’s been worse than that. But perhaps the biggest disappointment has been the team’s shortstop, Ian Desmond, who was projected for the second-highest WAR among Nationals hitters by ZiPS. Desmond’s .229/.279/.384 batting line has put him within spitting distance of replacement level — a far cry from his preseason ZiPS forecast of 4.0 WAR.

Despite his struggles, the Nationals stuck with Desmond over the season’s first four-and-a-half months, trotting him out there in 119 of their 123 games this season. But on Friday, the team began to diverge from the status quo. After weeks of speculation, the Nats finally summoned prospect Trea Turner to the big leagues to help solidify the shortstop position from here on out.

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The Nationals have not played very well in the second half. This isn’t news. Since the break, they have an 8-12 record and have been outscored by 11 runs. This isn’t a soul-crushing stretch by any means, but when your competition is red hot, a stretch where you’re only scoring 3.65 runs per game can certainly seem soul crushing. The interesting question to me is what the Nationals can do about it? Are they content to just wait this out and take the patient approach that eventually their hitters will snap out of it, or is it time for action? Actually, let’s rephrase that — what actions can the Nationals even take?

We know that the Nationals have a great pitching staff. Their bullpen unit is solid. The core unit they’ve relied on the most the past 30 days — Aaron Barrett, Casey Janssen, Felipe Rivero, Tanner Roark and Drew Storen — has done pretty well. The worst xFIP- among those pitchers for the past 30 days is Rivero’s 114. For the season, the highest belongs to Janssen at 108. Perhaps there isn’t enough reliability in that group, especially given Storen’s playoff experience. So to that mix they have added Jonathan Papelbon. Potential problem addressed.
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When the Nationals picked up Jonathan Papelbon, they weren’t doing so to replace Drew Storen, but they knew they’d be giving him a demotion. It didn’t sit real well with Storen, nor did it sit well with a large number of fans, who wondered what Storen did to deserve getting booted from the closer role. Storen is in the middle of probably the best season of his career, with a strikeout rate that’s skyrocketed from last year’s one in five hitters to this year’s one in three. Storen has become a real shutdown reliever, and you generally don’t see those guys losing responsibilities.

But it is possible for Storen and Papelbon to share the later innings. Provided they get along, having both ought to be better than having one or the other, and Papelbon, for his part, was quickly impressed by the younger righty. A tweet that went around:

Jonathan Papelbon: “I was in the shower with Storen, I said ‘can you show me that slider grip tomorrow?’ He was really, really good.”

— Chris Johnson (@masnCJ) July 30, 2015

That slider — we should talk about that slider. Drew Storen has long thrown a slider, but his slider this year is behaving differently, and while you can’t simply chalk his entire improvement up to a tweak of one pitch, it seems to be a major component. Now, some weeks back, Owen already discussed a bit of what was going on. He highlighted some of the changes, and pointed out how successful the pitch is. So, Owen wrote about why the pitch is notable. I want to tell you why it might look familiar.

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Watching the Mets and the Nationals Sunday night on ESPN, there was a lot of talk about momentum. Momentum that the Mets seem to have, which has allowed them to catch and overtake their heavily-favored rival. It’s an easy thing to say, and an easy thing to believe, but then, right before the Mets caught fire, you could argue they bottomed out. They lost to the Padres, they had the whole Carlos Gomez fiasco, and then they lost to the Padres much much worse. The Mets right now are at a local maximum. Immediately preceding this, they had crashed to a low point.

There are some parallels between the Mets as a whole and their own Lucas Duda. Overall this season, Duda’s been pretty good. Over the last week and a half or so, Duda’s been the very hottest hitter in baseball. But from the start of June through July 24, Duda slugged .275. He then ripped off a stretch of nine homers in eight games. The timelines aren’t the same, but, Duda, like the Mets, bottomed out, and then reversed course in an instant. Duda flipped his own momentum, and in so doing, he wound up bashing an anomalous dinger.

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This breakdown starts with the Scott Kazmir deal on July 23, but there weren’t any trades from the 16th to the 23rd, so this covers the whole second half of the month, trade-wise, up until now. I count 25 total trades with prospects involved in that span that add together to have 58 prospects on the move. Check out the preseason Top 200 List for more details, but I’ve added the range that each Future Value (FV) group fell in last year’s Top 200 to give you an idea of where they will fall in this winter’s list. Also see the preseason team-specific lists to see where the lower-rated prospects may fall within their new organization.

40 FV is the lowest grade that shows up on these numbered team lists, with 35+ and 35 FV prospects mentioned in the “Others of Note” section, so I’ll give blurbs for the 40 FV or better prospects here. I’ve also linked to the post-trade prospect breakdown for the trades I was able to analyze individually, so click there for more information. Alternately, click on the player’s name to see his player page with all his prior articles listed if I didn’t write up his trade.

I opted to not numerically rank these players now, but I will once I’ve made the dozens and dozens of calls necessary this fall and winter to have that level of precision with this many players. Look for the individual team lists to start rolling out in the next month, with the 2016 Top 200 list coming in early 2016. Lastly, the players are not ranked within their tiers, so these aren’t clues for where they will fall on the Top 200.

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Among the bright spots for the Nationals this year has been the emergence of Drew Storen. Already an effective reliever, Storen tweaked his breaking ball and became something of a strikeout machine. Instead of sitting down two of every 10 batters, Storen has bumped that up to three out of 10, succeeding as the closer for a first-place but somehow still disappointing team. As a reward for his step forward, the Nationals have demoted Storen out of the closer role, agreeing to pick up Jonathan Papelbon and everything that comes with him.

For a straight swap, this one’s a little complicated. The Nationals needed to convince Papelbon to come, and there was the matter of his $13-million vesting option. The option was almost sure to vest, but the Nationals opted to guarantee it for $11 million. That gives Papelbon some certainty, yet he’s also been given other certainty: the right to close, down the stretch. Technically, I suppose, the Nationals could go back on their word. And if Papelbon struggles, well, the Nationals would be stupid to leave him there. But this is without question the interesting thing. A team with a closer added a closer.

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Anyone who follows prospects knows that Washington Nationals pitching prospect Lucas Giolito comes with considerable hype. After being in consideration for the first overall pick in the 2012 draft before succumbing to elbow problems, Giolito has repeatedly shown the sort of form that put him in that conversation (one that, given the performance of Carlos Correa and Byron Buxton to date, is frankly quite lofty).

I have seen Giolito twice over the past two years, and I’ve happened to take in two of his more notable outings. Last August, I witnessed him toss five scoreless innings working exclusively with his fastball and changeup, and last week, I watched him throw seven no-hit frames after entering in the second inning. As one might expect, the heralded hurler showed plenty of substance behind his acclaim in both outings.

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Despite his below-average walk rate and high strikeout numbers, Ian Desmond’s power and speed have made up for his contact inadequacies during the past three years. He is, at once, an exciting and frustrating player to watch: a hitter prone to incredible dry spells followed by gluttonous power explosions. The Nationals have accepted his droughts — even going so far as to offer him a seven-year, $107 million dollar contract extension before the 2014 season — because the hot streaks were worth it.

Desmond has relied on that full combination of speed, low contact, and high power during the years since his breakout in 2012, and because of that, his skill set is a relatively tenuous one. We’ve seen players excel at a high level with those same type of skills, but the difference between productive and unproductive is closer when you rely on the ball going over the fence a certain number of times.

If we navigate to the batter leaderboards and sort by wRC+, Desmond has been the seventh-worst qualified offensive player in the majors this season. He’s been the very worst defensive shortstop. The nightmare scenario has come to fruition in Desmond’s walk year: a cratered home-run rate per fly ball (HR/FB), a walk rate dive, an almost total absence of speed, and really poor defense. The 2015 edition of Ian Desmond is now 2010 Desmond, except with more strikeouts and less on the base paths. Take a look:

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When you write up the worst called ball of the first half, you’re set up for a two-part series. You have to write up the worst called strike of the first half, as well, or else it feels like something is missing. Usually, I make my own editorial decisions. Technically, this was my decision. But really, this decision was out of my hands. Once the first post went, the second was guaranteed to follow.

Bad called strikes, I think, are less upsetting than bad called balls. Oh, they’re both annoying, but the worst called balls are on pitches down the middle, and it seems inconceivable that an umpire could miss a pitch down the pipe. It’s easier to see why an umpire might grant a strike on a pitch out of the zone. There’s no such thing as the middle of the out-of-the-zone. We’ve grown accustomed to seeing strikes off the plate, so, what’s another inch or two? When you see a strike out of the zone, you think, ugh, whatever. When you see a ball on a pitch down the middle, you think, how did that happen? This is the long way of saying this post might be less interesting than the first one.

But here we are anyway, and your own curiosity will prevent you from leaving this post until you see the result. What’s been the worst called strike of the first half? I don’t mean the strike with the lowest called-strike probability, adjusting for count and handedness and everything. I mean just relative to the rule-book zone, which is directly over home plate. This pitch was 10.7 inches away from the border of the rule-book zone, as it crossed the front plane:

Pretty bad! Lefty strike, but, pretty bad. Clearly outside. One pitch was worse than this.

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