Marcus Semien is having a moment. Semien finished the 2018 season with 3.7 WAR, nearly doubling the next-best total of his career. There was a catch, however, in that Semien’s WAR was largely fueled by a sudden jump in his defensive numbers. While the numbers for Baseball Info Solutions and Ultimate Zone Rating never completely agreed on Semien, they both thought he was a below-average defender at short. Coming into 2018, per 1350 innings, BIS had Semien at -2.7 runs, while UZR had him at -7.6 runs. In 2018, those numbers were +8.5 runs and +7.9 runs respectively, numbers that, if believed, meant that Semien had added 10-to-15 runs of value from somewhere very unexpected.

While a White Sox prospect, it was thought that Semien would likely struggle playing shortstop in the majors. In the minors, he made 60 errors in 2203 innings (37 errors per 1350 innings), which led the White Sox to find as much time for him at second and third base as possible. And while error rates usually come down in the majors, Semien committed 35 errors in his first season as the A’s shortstop. You could argue that errors can be overused as a method of defensive evaluation — and you’d be correct — but there are limits. UZR actually had Semien as slightly above-average in range, with the -11.7 total run estimate coming from a brutal -12.6 runs from errors. That’s not a run-of-the-mill error-prone season, either:

Read the rest of this entry »

The past year has been a whirlwind for Liam Hendriks. A little over a year ago, he was designated for assignment by the Oakland Athletics. At that point in the 2018 season, he was sporting a 7.36 ERA with an ugly 6.43 FIP while also missing more than a month with a groin strain. No one claimed him on waivers and he was sent outright to Triple-A. He worked hard to regain his confidence while also honing his repertoire. He was recalled in September and pitched well enough as an opener to get the start in the Wild Card game against the Yankees. However, that game didn’t go to plan after an Aaron Judge two-run homer got the home team on the board early.

Even after all those setbacks, Hendriks has flourished as a critical piece in the A’s bullpen this year. He started the year in a familiar role, making a couple of opener starts and coming out of the pen as a middle reliever. But as the back-end of the Oakland bullpen began to struggle, Hendriks found his way into higher leverage situations. The climax of his year-long turnaround came when he was named to the American League All-Star team as a replacement for Charlie Morton.

Here’s how Hendriks stacks up against his fellow All-Star relievers and a few other top candidates.

Any of the other candidates listed above could have been chosen and no one would have batted an eye (ok, maybe not Ian Kennedy). But Hendriks leads the AL in WAR as well as park- and league-adjusted ERA. He’s been terrific, and the adjustments he’s made since last September are driving his newfound success. Read the rest of this entry »

One element missing from the Oakland A’s in recent years has been an ability to develop long-term, high-quality starting pitchers. The cupboard hasn’t been completely bare, with Sonny Gray notably appearing on the cusp of establishing himself as one of the best starting pitchers in the league before a series of injuries waylaid him starting in 2016. Whether ultimate responsibility comes down to failure in developing pitchers or not choosing the right ones in the draft, the A’s have a poor record at finding starters. Gray remains the most-recent drafted pitcher to amass even five WAR in his MLB career.

The legacy of the trio of Mark Mulder, Tim Hudson, and Barry Zito leaves a long shadow on the franchise. In the past 20 years, the A’s have a total of 39 top-50 starting pitcher seasons. That’s above-average (you’d expect an average team to have roughly 33 of these seasons), but it’s also skewed very heavily in favor of the pitchers the team had back when we were worried that the Y2K bug would destroy humanity something something.

Wait, Gil Heredia had a top-50 season? Read the rest of this entry »

Pitchers learn and develop different pitches, and they do so at varying stages of their lives. It might be a curveball in high school, a cutter in college, or a changeup in A-ball. Sometimes the addition or refinement is a natural progression — graduating from Pitching 101 to advanced course work — and often it’s a matter of necessity. In order to get hitters out as the quality of competition improves, a pitcher needs to optimize his repertoire.

In this installment of the series, we’ll hear from three pitchers — Brett Anderson, Anthony Swarzak, and Jimmy Yacabonis — on how they learned and developed their sliders.

———

Brett Anderson, Oakland A’s

“My go-to has always been my slider. I’ve evolved into more of a sinker guy now, but at the same time, my slider has kind of been my bread and butter for however long I can imagine. It’s what I get my swings-and-misses with.

“I knew I had a chance to pitch on the varsity team as a freshman [in high school]. I wasn’t going to go in there with a fastball and a changeup only, so I started throwing a curveball. It was a spiked curveball, because I have huge palms and short fingers. I’ve never really been able to throw a conventional breaking ball because of that; everything just kind of slipped out.

“I started off with that get-me-over curveball, just to have something that spun against varsity kids. It was like a 12-6. Then I started throwing one that was straighter and it cut a little bit. I kind of morphed that one into a slider. It’s the same grip essentially, but two different pitches. I get on top for a curveball, usually just to get ahead, or to get back in the count; it’s to steal strikes. The slider is more of my put-away. I spike both pitches, the slider and the curveball. Read the rest of this entry »

In August of last year, Ramón Laureano burst onto the scene with the Oakland Athletics. A mid-level prospect with the Astros, the strength of their big league outfield and the depth of their farm system pushed him out of the picture in Houston. He was traded to Oakland for a pittance in the fall of 2017 and made his major league debut on August 3. Just a week into his time in the majors, he made The Throw. You probably remember this one:

He hasn’t stopped throwing runners out with his rocket arm.

He’s made four more outfield assists since the above tweet was posted, giving him 15 across 115 career games in center field. Over the past two years, he’s second in the majors in outfield assists behind Teoscar Hernández, who has almost 400 more innings in the field than Laureano. The advanced defensive metrics back up what all those assists tell us. Since the beginning of 2018, he’s sixth in the majors in UZR’s ARM component and seventh in DRS’s rARM component. And remember, he didn’t make his major league debut until well into last season, so he’s had far fewer innings to accumulate positive marks for his throws. Read the rest of this entry »

Pitchers learn and develop different pitches, and they do so at varying stages of their lives. It might be a curveball in high school, a cutter in college, or a changeup in A-ball. Sometimes the addition or refinement is a natural progression — graduating from Pitching 101 to advanced course work — and often it’s a matter of necessity. In order to get hitters out as the quality of competition improves, a pitcher needs to optimize his repertoire.

In this installment of the series, we’ll hear from three pitchers — Ryan Dull, Tim Mayza, and Spencer Turnbull — on how they learned and developed their sliders.

———

Ryan Dull, Oakland A’s

“I started messing around with a slider my junior year of college. We happened to have some scouts over — it was a scout-day — and they talked to my coach about my curveball. They said I would best benefit by getting rid of it altogether, and throwing a slider. The day after that, I got together with the guy on our team who had the best slider, and started working on one. We worked on it every day.

“I actually started throwing it with a softball at first. My pitching coach in college, Aaron Rembert, had me do that. It helps give you a feel of how you get on top, and around, it. It won’t move like it would if it were a baseball, but you’ll be able to see the spin. You throw five to ten [pitches] with a softball, then take a baseball, which will give you the break you want. Read the rest of this entry »

It remains one of the game’s unsolved mysteries. A batter hits a pop-up near the mound and the person closest to it — a professional athlete wearing a glove — isn’t expected to catch the ball. Moreover, he’s not supposed to catch the ball. That job belongs to any one of several teammates, all of whom has traversed a greater distance. As often as not they’re climbing a slope to get under the descending baseball.

Chaos can ensue as the infielders and the catcher converge. The multiple “I’ve got its,” are drowned out by crowd noise and suddenly what should be a routine out becomes an adventure. We’ve all seen it. A bumper-car-like collision occurs and the catch is made clumsily… or not at all.

Just last week, Red Sox right-hander Rick Porcello was charged with an error when he failed to catch a pop up in front of the mound. Not because of ineptitude, but rather because he was veritably mugged by his catcher as the ball was about to arrive comfortably in his glove.

Why aren’t pitchers expected to handle simple pop-ups? They’re perfectly capable, so it makes sense that they should be catching them. Right?

“I don’t know why, and yes, they should be,’ said Seattle’s Perry Hill, whom many consider the game’s best infield instructor. “They’re on on the field of play when the ball is in play, so they should be able to make a play. It’s practiced in spring training. That little short pop-up that nobody can get to. The third baseman is playing way back. The first baseman is way back. The pitcher is the closest guy to the ball. He’ll catch that ball.”

Scott Servais sees it somewhat differently than his first base coach. Read the rest of this entry »

Here’s the chart that got me interested in what Marcus Semien is up to:

It’s the last two columns that should grab your attention. Semien is walking nearly two-thirds more often this year than he’s ever walked before, and striking out less, too. Those are good things for hitters to do, and they’ve resulted in a 24-point increase in Semien’s wOBA (.335) compared to what had been his career mark (.311). If that figure holds, it will be the best of Semien’s career by 20 points.

Semien has experienced stretches of similar success before. For a brief period at the beginning of the 2017 season, before being put out of commission by a wrist injury, Semien was walking nearly 17% of the time — but also striking out in something like 27% of his plate appearances. He brought that number down beginning in early 2018, to something like its current levels, but saw his walk rate drop back down below 5% as he did so. Not until the early part of this 2019 season have we seen a Semien who is both walking a lot and not striking out that much:

Read the rest of this entry »

Pitchers learn and develop different pitches, and they do so at varying stages of their lives. It might be a curveball in high school, a cutter in college, or a changeup in A-ball. Sometimes the addition or refinement is a natural progression — graduating from Pitching 101 to advanced course work — and often it’s a matter of necessity. In order to get hitters out as the quality of competition improves, a pitcher needs to optimize his repertoire.

In this installment of the series, we’ll hear from three pitchers — Jalen Beeks, Dallas Braden, and John Means— on how they learned and developed their changeups.

———

Jalen Beeks, Tampa Bay Rays

“I had a changeup in high school, but it wasn’t very good. When I got to college, I changed the grip; I moved my pinky finger down. It’s pretty much a circle change. I grip it hard and think about it almost like a fastball. I don’t pronate. No one taught it to me. I just threw it one day and it worked. You have to tinker. You have to figure out what works for you.

“It’s gotten better over the last year. I think that’s mainly from my mechanics having changed a little bit. I use my legs more, and have shortened my arm action. I’m not so tall on the mound now. I’m activating my legs more, by getting into more of a squat position. And like I said, I think fastball. I throw it as hard as I can. My average fastball is around 92 [mph] and my changeup is around 88. Read the rest of this entry »

When baseball fans quibble with sabermetrics, one of the arguments I hear is, “If we can already predict everything that will happen, then why isn’t baseball just played on a computer?” It’s a funny stance to me for two reasons. First, statistics can’t predict everything; they can only tell you the odds of an event occurring. And, second, the randomness of baseball — and, really, sports in general — is something that even the most devout statisticians can marvel at.

Mike Fiers threw the second no-hitter of his career last week. Rachael McDaniel did a brilliant job of explaining how unlikely it was for Fiers, the individual, to have the fortunate of joining the group of 35 pitchers to throw two no-hitters in the big leagues. I just want to borrow a few lines from McDaniel’s prose, but you should really read the whole thing. It’s great:

That’s the wonderful thing about pitching achievements, the no-hitter and the perfect game. With their length and intensity, with the level of collaboration and the sprinkling of luck that is necessary to sustain that nine-inning walk along the knife’s edge, there is so much room for serendipity. In the annals of the no-hitter, you can just as easily find the greatest of all time proving why they’re the greatest as you can a roster of unlikely heroes — rookies, journeymen, washed-up veterans — who, for those few hours, reach out and find perfection.

I want to take a second crack of explaining how unlikely Fiers’ second no-hitter was, but with a different angle: math. Read the rest of this entry »