On the day of baseball’s non-tender trade deadline, the San Diego Padres traded first baseman Yonder Alonso and lefty reliever Marc Rzepczynski to Oakland in exchange for left-hander Drew Pomeranz and minor-leaguer Jose Torres. For those interested, Craig Edwards examined the trade in a general way earlier this morning. The point of this post is to look more closely at one part of the trade: Drew Pomeranz.

If Pomeranz is just a good reliever, then the deal amounts mostly to this: three years of control for a good reliever in exchange for two years of a first baseman who can be league average two-thirds of the time. Maybe, to make a trade like that even, you’d have to add a piece or two to get Alonso, but that’s when the deal makes the most sense for the Athletics.

The deal makes better sense for the Padres if Pomeranz is a starter. And it looks like the team is considering him a starting pitcher for the time being.

The question of whether or not Pomeranz can be a good starting pitcher for the Padres hinges on three things, most likely: his health, his changeup, and his curveball. Earlier this season, I talked to the pitcher about all three.

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With the non-tender deadline approaching on Wednesday, deals for arbitration-eligible players were going to be much more likely than the big free-agent contract we saw the Boston Red Sox hand David Price on Tuesday. Teams, especially small-market teams like the San Diego Padres and Oakland Athletics, have a tendency to move around players whose production on the field is becoming less valuable relative to the increasing expense (due to arbitration) of employing those players. The A’s and Padres completed a four-player deal on Wednesday. Not surprisingly, three of the four players were arbitration-eligible. The Padres will receive starter-turned-reliever Drew Pomeranz and minor-leaguer Jose Torres while the A’s will receive first baseman Yonder Alonso and lefty reliever Marc Rzepczynski.

The motivations for both clubs are fairly transparent. Last season, the Padres attempted an experiment that involved putting Wil Myers in center field and putting Matt Kemp and Justin Upton alongside him. The experiment did not go well. Myers, who had been a right fielder, was ill-equipped to handle center field. Placing the poor defense of Matt Kemp next to him did not help matters. The Padres have apparently seen the error of their ways and will not attempt a similar alignment next season. Myers recently said he would prefer to play first base, and this trade will allow him to do so and leave the Padres open to pursuing a new center fielder while they spend a few years waiting for Manuel Margot.

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Major League Baseball interrupts this Thanksgiving holiday week to announce that Jed Lowrie has been traded from the Astros to the A’s in exchange for minor-league reliever Brendan McCurry. Perhaps it’s a move you find a little strange — Lowrie is in his 30s, and he’s due real money for at least another couple years. He’s going from one team with a very low payroll to another, and last year, the team adding Lowrie won 18 fewer games than the team shedding Lowrie. Typically you see trades like this in the other direction, but for the Astros, Lowrie was no longer a necessary piece. And the A’s are forever on the bubble, trying to avoid any kind of major tear-down. The A’s want to try to contend again. Having Liam Hendriks and a hopefully healthy Sean Doolittle addresses what last year was a catastrophic problem.

That’s the whole idea, in short. The Astros didn’t need Lowrie, and they’ll take the financial flexibility and the interesting young reliever. McCurry could have a real future, and he could have it soon. The A’s, meanwhile, are happy to have Lowrie back at a modest cost, and they like his flexibility. From one perspective, he gives them depth; from another perspective, he gives them trade options. A healthier A’s team could be a .500 ballclub, and a .500 ballclub is always close to the hunt. Okay, everything checks out.

The thing I find most interesting isn’t the Astros’ position, nor is it the A’s position. It isn’t McCurry, either. It’s Lowrie himself. Just how good is Jed Lowrie, really? There’s room for very reasonable disagreement.

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When you come up through the ranks as a young lefty starter, you learn about the importance of the changeup. By breaking away from the right-handed batter, that pitch offers the best way to neutralize the natural platoon advantage those hitters have against you. By the time you get to the big leagues, it’s part of your approach, like it or not. That’s why lefty starters throw changeups 65% more often than righty starters in major league baseball.

If you look at Jon Lester’s career, though, his best years have come when he’s thrown his changeup the least. The flippant reason for that truth might be because his changeup isn’t that great, and his other pitches are better. The long version is much more interesting, though, as it gets to the theory of changeups, and a new concept called tunneling.

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When Dave Cameron wrote up the Athletics’ signing of Rich Hill yesterday, he titled it “A’s Sign Rich Hill, Because Of Course They Do.” He focused more on the fact that Hill was a resurgent pitcher that represented a low-risk, high-reward, low-money signing — a bit like Scott Kazmir before the 2014 season. That makes a lot of sense, given Oakland’s budget constraints and past practices.

There’s another way Hill is the perfect major league acquisition for the Athletics, though. He’s a fastball/curve guy with an iffy changeup. He’ll fit right in.

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Earlier this week, I took a look at the AL Cy Young race, utilizing batted-ball metrics to address the respective candidacies of David Price, Dallas Keuchel and Chris Sale. To make a long story short, I concluded that Sale’s strikeout-to-walk (K/BB) superiority, along with solid contact management skills that have been obscured by his horrendous team defense, placed him on top. Some readers expressed incredulity in the comment section, not believing that even the worst defense in the game could cost a pitcher one full point of ERA.

Today, let’s look at the counterweight to Chris Sale, Sonny Gray. Though he wasn’t quite the same guy in the second half as he was in the first, he has wrapped up a very strong campaign, especially in the more traditionally accepted statistical categories. He’ll finish third in the AL in ERA (2.73) and is likely to receive his share of down-ballot Cy Young votes, possibly enough to nose out Sale for third place overall. Sale’s ERA is 0.78 higher than his FIP, and as we saw the other day, 1.02 higher than his “tru” ERA, which incorporates Statcast batted ball data. Gray finishes 2015 with an ERA 0.73 lower than his FIP. What gives, and what is the true talent level exhibited by Gray this season?

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Sam Fuld was checking out his FanGraphs page the other day, and noticed that he’s a fairly fast-paced guy at the plate. He produced in 2011 the 36th-fastest pace between that season and the present one (minimum 300 plate appearances), and he’s the 20th-fastest paced batter this year. He also noticed something about the guys around him. “They’re all slap hitters!” he told me before a game against the Rangers.

He wondered if pace was correlated to power, and if this slower pace came through the mechanism of confidence. “I’m the star here,” he said, mimicking a step back out of the box and a shrug of the shoulders that’s a little foreign to the Athletics outfielder with 12 career home runs spread over nine years and 1500-plus plate appearances.

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Barry Zito is coming back! Zito, who hasn’t thrown a pitch in the majors since 2013, has been called up from Triple-A by the A’s. He’ll initially work out of the bullpen — which makes sense because what bullpen doesn’t need an old guy with no command who throws really slow? — but the A’s are so out of playoff contention they may as well clone an entire Zito army and deploy it in relief. “Looks like Clone Zito doesn’t have it tonight, and here’s Bob Melvin to make a change. He’s signaling for the left-hander, and here comes Clone Zito trolling in from the pen. This pitching change is sponsored by Firestone tires, by Zippo lighters, and by Shell Gasoline.”

I mention that so I can mention this: I wonder if Barry Zito can throw the slowest fastball this season? Zito is renowned for his fastball velocity like Metallica is renowned for their depth and subtlety. Back in 2007, Zito’s fastball reached 93 mph, but over the years he lost velocity like a ship made of chicken wire loses buoyancy. In his most recent season, 2013, his four-seamer averaged 82.6 mph with a high of 85.6 mph and a low of…

[Drum roll]

…

[More drum roll]

…

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While working on something Erasmo Ramirez said — that his slider was always in the zone anyway, so he should probably use it to steal strikes rather than for swinging strikes — it became obvious that breaking pitches are much less effective in the zone than out when it comes to swinging strikes. Curves, in particular, are much better outside the zone. You get about one third of the whiffs on a curve in the zone as you do outside of the zone.

Separately, I’m working on a piece for The Hardball Times Annual about command. In it, a few pitchers talk about the difficulty of commanding breaking pitches. “Nobody throws anything that’s truly straight,” is how Trevor Bauer put it.

While sorting the in and out of zone whiff rates, and thinking about command, it came to me that the two are related. Maybe that’s a duh, but a big part of quantifying command is the problem of breaking balls and changeups and their movement. A breaking ball in the zone may often be a hung breaking ball, which contributes to the lower whiff rates.

Let’s take a look at the pitchers that have the most disparate results on their non fastballs inside and outside the zone first, and then try to find a way to spot these pitchers by movement.

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The first time Sean Doolittle’s career almost ended, he still owned a first baseman’s glove. The second time his career almost ended, he was clutching his throwing shoulder and wondering why he couldn’t crack 90 mph on the radar gun. During his second comeback, often he wondered why he was “pitching with the brake on” as he put it last week.

A tweak to his repertoire and a tweak to his rehab, and things are starting to look up for the Oakland left-hander. He’s now hit 95 mph six times in his last three outings, including Monday in the second half of a back-to-back appearance.

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