The Rangers are currently riding a six-game winning streak. That’s the longest active streak around! Now, to be fair, three of those wins came against the Padres, who are bad, and the other three came against the A’s, who are more bad than good. And even with the winning streak they’ve pulled off, the Rangers still have one more loss than they have wins. They’re under .500 and eight games out of first. Suffice to say, the Rangers haven’t come sprinting out of the gate.

But it would be easy to look at the Rangers and feel a little disappointed. What if we were to spin things in the other direction? It’s true that, yes, overall, the Rangers have failed to impress. Yet at the same time, it’s impressive that they’re even 19-20, given how things have gone. Rangers fans are probably already acutely aware of what I’m going to discuss, but, it’s time to talk about the top of the Rangers’ roster.

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Previously
Changeups: AL Starters / NL Starters.
Curveballs: AL Starters / NL Starters.
Cutters and Splitters: MLB Starters.
Four-Seamers: AL Starters / NL Starters.

Our series evaluating the individual pitch offerings of 2016 ERA qualifiers grinds on. Actually hoped to be finished by now, but I’ve been writing a little bit more over at ESPN Insider (shameless plug), slowing down my progress here. We’re going to double up today, and tackle both AL and NL two-seam fastballs.

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One of the more fascinating rollouts from Baseball Savant this season has been xwOBA, a metric that utilizes launch angle and exit velocity to assign a hit value (single, double, triple, home run, or out) to every batted ball and then translates the results to “expected” wOBA. Why does it matter? By stripping out the influence of luck and defense, it gets closer to something like a “deserved” hitting number.

Here’s what the glossary at MLB.com says about the metric:

xwOBA is more indicative of a player’s skill than regular wOBA, as xwOBA removes defense from the equation. Hitters, and likewise pitchers, are able to influence exit velocity and launch angle but have no control over what happens to a batted ball once it is put into play.

For instance, Tigers first baseman Miguel Cabrera produced a .399 wOBA in 2016. But based on the quality of his contact, his xwOBA was .459.

For the most part, those claims make sense. But that’s not to say xwOBA can’t be beaten. To understand how, let’s look a little bit at how wOBA compares to xwOBA. Let’s begin by looking at all players from last season who recorded at least 400 at bats and compared their wOBAs to their xwOBAs. The scatter plot looks like this.

There’s a pretty strong relationship there. Of the 183 players represented above, 150 had a disparity between wOBA and xwOBA under 30 points. That seems pretty conclusive.

So what are we to do with this data? We could look at the outliers on either end, presume that they were either unlucky or lucky when it came to batted balls, and then move on with the analysis. However, before we do that, we might want to look at other reasons for the potential disparity. To that end, I did an eye test of sorts. I took all players with at least 400 at bats in both 2015 and 2016 and looked at their xwOBA minus wOBA in both seasons. If a player had a negative number, he might be considered to have had some good luck. If the numbers were positive, he might have had some bad luck.

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Let’s take a look at the standings, shall we? The Diamondbacks are presently sitting in…okay, third place. But while they might be third place in the National League West, they’re also fifth place in the National League, overall, meaning they occupy a playoff spot. In other words, it’s been more of a good start than a bad one. And an encouraging start, given the organizational shake-up between years.

If you’ll remember, coming into the season, the Diamondbacks were defined by what you could call an intriguing post-hype pitching staff. It stood to reason that, if it was going to be a good year, they’d need those pitchers to deliver on the promise they’d had before. And, wouldn’t you know it, but according to the leaderboards, the Diamondbacks are fifth in baseball in pitching-staff WAR. They’re first among starting rotations. The effectiveness has been there, even despite Shelby Miller’s injury.

About that! Miller’s absence opened up a spot. One turn was given to Braden Shipley. The other three turns have gone to Zack Godley. Over three starts and 18.2 innings, Godley’s got 19 strikeouts, with four runs allowed. It’s not so much that Godley has been unhittable. It’s that he’s been good, and better than before. Godley, who’s never been a Baseball America top-10 organizational prospect. There’s a new exciting pitcher on the staff.

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Hunter Renfroe had a huge game last night. The Padres outfielder hammered a two-run double in the second inning and followed with a two-run homer in the 10th. The latter was a walk-off, giving San Diego a 6-5 win over the Milwaukee Brewers. The blast was his seventh on the season, tying him with Josh Bell and Cody Bellinger for the lead among NL rookies.

Renfroe’s overall numbers aren’t great — his slash line is .217/.273/.406 — but he’s showing signs of breaking out. Over his last six games, the 25-year-old former first-round pick is 6-for-18, and four of those safeties have gone for extra bases. Every bit as notable is the fact that he’s drawn seven free passes. Selectivity has never been a strong suit for the slugger, but given his ability to propel baseballs long distances, a more-discerning eye could very well be his ticket to stardom.

There’s no questioning his raw power. The Mississippi State product left the yard 30 times last year for Triple-A El Paso while capturing Pacific Coast League MVP honors. He added four more dingers after a late-September call-up. Six of the 11 home runs Renfroe has hit in a big-league uniform have traveled over 400 feet.

Renfroe discussed his power-laden gap-to-gap approach, and his views on launch-angle data, prior to the start of the regular season.

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Renfroe on launch-angle data: “I’m obviously aware of it, but the ball is moving. It’s not sitting on a tee, so you can’t stand in the box and think about things like launch angle when the ball is coming at you 98 mph. You hit it, and whatever it does… you know? Hopefully you hit it on the barrel at a good angle, and it makes it over the fence, or at least goes for a double, or even a single.

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CLEVELAND – Miguel Sano knows what he wants.

In the visiting team quarters in Progressive Field, there’s a small kitchen — like something you might find in a World War II-era submarine — that offers players various pre- and post-game sustenance. On Sunday morning, Sano, apparently unsatisfied with the options, disappeared from the clubhouse and reappeared with rectangular aluminum carry-out pan containing mangú, a Dominican breakfast dish of mashed plantains topped with a type of thinly sliced sausage. He said he had procured it from a local restaurant. The 6-foot-4, 260-pound Sano is known as a popular teammate and this catering feat was a prime example. As he appeared with breakfast, several of his teammates, also of Dominican origin, huddled around a card table in the center of the clubhouse for a Sunday morning feast.

Sano is selective at the plate, too.

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Imagine the average Yasiel Puig plate appearance. What does it look like to you? One thing it might look like is Puig flailing at a bunch of low-away sliders. Now, I don’t actually know what’s in your head. I don’t know how you think about Puig. But just in case you think he is extremely vulnerable to breaking stuff, do I have news for you!

I have prepared two plots, showing the entirety of Puig’s major-league career. Here is a rolling-average plot of Puig’s rate of fastballs seen:

Great! He’s gone through some low-fastball phases before. Now he’s higher than ever. I should tell you that, for context, baseball-wide fastball rates are going *down*. So, the average hitter is seeing fewer fastballs than ever before. Puig is seeing more fastballs than ever before. All right, that’s part of it. Time to fold in run values. Here’s the same idea, where I’ve just summed up Puig’s fastball run values above or below average over rolling 30-game stretches.

It shouldn’t surprise you to see how cyclical things are. Underneath, that’s how baseball tends to work — something gets the job done until it doesn’t, at which point adjustments are made, and then more adjustments are made, and on and on. Puig has gone through troughs, followed by peaks, but Puig has been at another low. How low? So far, there are 208 hitters this season who have batted at least 100 times. Puig owns baseball’s highest fastball rate, at 68%. Last year, he was at 60%. And while this has been going on, Puig is sitting on baseball’s third-worst fastball run value, at -8.9 runs. Only Dansby Swanson and Alcides Escobar have been worse. Pitch-type run values, of course, are prone to noise in either direction, but both these factors are fairly convincing together. Puig’s seeing more fastballs because he’s doing less to them.

Here are Puig’s fastball run values by season, expressed as runs above or below average per 100 fastballs:

• 2013: +1.7 runs per 100 fastballs
• 2014: +1.4
• 2015: +1.0
• 2016: -0.5
• 2017: -2.4

So far this season, Puig has been pretty good against both sliders and changeups. It’s almost as if he’s focused too hard on addressing a weakness, such that now he’s just behind faster pitches. It’s something to work on, and with Puig, it’s just another adjustment to attempt. There’s always something, but I guess you could say that’s true for anybody.

It could be misstating things to assert that Puig’s on a high-fastball diet. Pitchers, certainly, are giving him a steady diet of fastballs. Yet relatively few of them are being consumed. So, the headline could probably stand to be fixed. Give me a few seconds to get on that.

Let’s do some quick review! One stat we have on our pages shows up as IFFB%. This measures the rate of infield pop-ups per fly ball hit. You know this measure — this is the one where Joey Votto is a freak.

Another stat we have on our pages shows up as HR/FB. This measures the rate of home runs per fly ball hit. You also know this measure — this is the one where Aaron Judge is a freak. (And, seemingly, everybody else.)

Both of these numbers make sense to look at for individuals, and for teams. Let’s think about teams. In fact, let’s think about one specific team, that being the Milwaukee Brewers. This season, the Brewers have hit pop-ups on 6.2% of their fly balls. That’s the lowest rate for any team. Also, this season, the Brewers have hit home runs on 20.6% of their fly balls. That’s the highest rate for any team. The Brewers currently rank as the best by each measure. That means they rank No. 1.

We have this batted-ball data going back to 2002, which gives us 15 full individual seasons, and one partial one. Combining everything, here is a table of the 10 best offensive teams by average rank in these two stats.

In short, the Brewers are trying to be the first team in a decade and a half or so to be better than anyone else in terms of pop-ups and homers. The 2004 Yankees came tantalizingly close to dual No. 1s, but they were narrowly edged out in pop-ups by the Tigers. I’m sure the Yankees didn’t mind, and it’s not like this is the end goal of the whole Brewers organization, but this is, overall, a positive reflection of the lineup through to this point. Although they’ve swung and missed, this is how you make the most of fly balls.

As it happens, these Brewers are actually tied with the 2015 Giants for what would be the lowest pop-up rate in the whole window. And no team has previously reached even 17% home runs per fly ball; the Brewers are close to 21%. So, technically, they rank No. 1 in each category this season, and they also rank No. 1 in each category over all 15+ seasons. This is a remarkable partial achievement!

In closing, this year’s team with the worst average rank is the Red Sox, who are 27th by pop-ups and 29th by homers. No team has ever finished last in both categories. The closest was the 2014 Royals, who were worst in homers and second-worst in pop-ups. The 2014 Royals lost the World Series in seven games. Don’t accuse me of overselling.

I’ve always loved Bronson Arroyo’s leg kick. There’s some whimsy in it, is maybe why. At the very least, it represents a different mechanical approach than one finds elsewhere in the league.

Turns out, there are reasons against flinging the lead leg out into space like Arroyo does — and yet, his reasons for doing it make some sort of sense, as well. And in between the two, there’s even something about the future of baseball in that kick. It’s a kick that contains multitudes.

First, let’s revel in its glory — in this case, from the hitter’s view. Is it… majestic?

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