ATT Park, from behind home plate, at game time for a night game.

Justin Upton has hit the ground running in San Diego. His power stats have not suffered as much as you might expect, at least, as his isolated slugging (.194) and home runs per fly ball (16.7%) are right in line with career norms (.201 and 15.1%, respectively). When I asked him about hitting in San Diego, he shrugged it off. He also said something interesting about San Francisco’s park.

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It seems like a simple question to ask. Which recent home run was the least likely?

You could flippantly answer — the one Erick Aybar hit this year, or the one Melky Cabrera hit this year — and because they’ve got the lowest isolated slugging percentages with at least one homer hit, you would be right. But that doesn’t control for the quality of the pitcher. Aybar hit his off of Rick Porcello, who is having some issues with the home run right now.

A slightly more sophisticated approach might have you scan down the list of the worst isolated powers in the game right now, and then cross-reference those names with the pitchers that allowed those home runs. If you do that, you’ll eventually settle on Alexei Ramirez, who hit his first homer of the year off of Johnny Cueto earlier this year.

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Command is a funny thing. It’s not easy to spot in the numbers. You have to watch a game and see the pitcher consistently miss his spots before you start to understand that even a guy with great walk rates may not have great command. Taijuan Walker does not have good command. He also walked 9.5% of the batters he faced in the minor leagues, a number that isn’t as far off the American League average this year (7.6%) as you might expect.

Pretty sure the catcher wanted this fastball low and away.

Over the last four starts, Walker has walked three batters in 29 innings. If you have an opinion regarding Walker’s command, you probably won’t change it over four starts. But Walker is still young enough, and not yet fully formed — perhaps there’s something else he’s done that can help us better understand why command is so hard to quantify. And also how likely it is that Walker can keep up this production.

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O.co Coliseum prepares for the Athletics’ LGBT Pride Night.

The Athletics had an LGBT Pride event Wednesday night, and the night was peppered with love for many people that haven’t always felt comfortable at the ballpark.

Opera Singer Breanna Sinclaire, the first trans singer accepted into the San Francisco Conservatory of Music’s master’s program according to the San Francisco Chronicle, sang the anthem. According to Major League Baseball, she was also the first trans singer to perform the anthem.

MLB ambassador of inclusion Billy Bean was in the building, and was part of the impetus for the event, as the news of this event came out after he addressed the Athletics in Spring Training.

Sean Doolittle’s partner Eireann Dolan helped improve the event, as she not only offered to buy back tickets from disgruntled ticketholders with a heartfelt and funny letter, but also started a GoFundMe to help pay for even more donated tickets to members of Our Space, AIDS Project East Bay and Frameline, a nonprofit LGBTQ cinema foundation.

It seemed like a good time to ask the ballplayers willing to comment about the issue at hand: is baseball ready for an openly gay player, and what obstacles might they face when it happens? Even with a few “no comments,” the opinions given all had their own unique angle, and showed that even a ready country and sport will not make the first openly gay player’s professional life easy.

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Step one for Mike Bolsinger was throwing a unique curve.

Only eight players in 2014 had a smaller velocity difference between their fastball and curve, and his curve is two ticks faster than the average curve, which led me to highlight him in my JABO piece on what makes great curveballs. That piece helped alert the Dodgers’ front office to his viability as a starter. They acquired him and then turned to him when depth became an issue. That gave him an opportunity.

Step two for Mike Bolsinger was adding a third pitch, of course.

Most interesting about this new pitch for Bolsinger might be that it’s not very different from the other two pitches he throws. He threw a cutter and a curve and now he’s throwing a … slider. Everything breaks towards his glove, and everything averages between 80 and 88 mph. Watch him pitch, and you’ll think he’s throwing the same pitch over and over again. Actually, he might be.

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Carlos Gonzalez is showing the worst power he’s shown since he was a rookie. He’s healthy, maybe, but he’s not producing, not yet. He’s still only 29, and there are signs of life — mostly centered around the velocity on the balls leaving his bat. Maybe he’s not done.

Batted Ball velocity is probably close to stabilization. Jeff Zimmerman found that the correlation between April and May’s batted ball velocities was already reasonably high (r^2 of .34, stabilization point is around .5) at the very least. So, in small samples like these, it does look meaningful to look at CarGo’s speedometer.

It’s healthy. By Baseball Savant, he has the fifth-highest maximum exit velocity this year. His average exit velocity is 58th of 273, or in he top fifth. On fly balls and line drives, he’s up to 45th.

If it seems like these aren’t elite numbers, maybe they aren’t. But Gonzalez hasn’t been an elite slugger, maybe? He’s 21st in isolated slugging since 2011, and 11th in home runs per fly ball. That’s fairly elite. But the bar was lowered in 2014, when he would have been 28th in ISO and 24th in HR/FB, had he qualified. That sort of bar seems reachable with his current velocity.

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It’s only been 35 major-league plate appearances, but Joey Gallo has already made quite the impression. The ball doesn’t fly off the bat any faster than it does off his, and he’s also second in the big leagues in three-true-outcome percentage (K%+BB%+HR%) — he’s a slugger’s slugger.

He’s also second in the big leagues in strikeout rate. “I’ve tried to cut down on them,” Gallo sighed when I asked. “I’ve tried. I promise.”

So we talked about the strikeouts, and what he can do about them, and why they have happened, and why they will continue to happen.

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J.D. Martinez is a thoughtful baseball player who has made major changes to his swing mechanics. As much as writing is what gets me out of bed on Monday mornings, it seems a shame to sully this one with too much of my own clumsy verbiage. So what follows is just J.D. Martinez, running us through the myriad realizations and swing changes he’s made since he was once a struggling Astro. Of course, there are a few edits and moving pictures.

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