Joc Pederson has had a strange career so far. In his six-plus seasons in the majors, he’s put together four solid seasons, with WAR totals ranging between 2.7 and 3.5. He’s done it with his bat — his career .230/.336/.470 slash line works out to a 118 wRC+. Because he’s done it on the Dodgers, however, he’s been no more than a platoon bat most years, and so in our heads, he’s mostly just a part-time player.

Over these six years, he’s been roughly as valuable as Mike Moustakas, Whit Merrifield, or AJ Pollock, all of whom have felt like stars at one point or another. He’s only 1 WAR shy of Michael Brantley, 2 WAR shy of new teammate Javier Báez. It’s hard to fight the lingering sense that he’s never gotten a full opportunity, though. At least, he hasn’t until now — on Friday, the Cubs signed Pederson to a one-year, $7 million deal, as first reported by Ken Rosenthal.

After non-tendering Kyle Schwarber, the Cubs lacked outfield depth, and that’s putting it charitably. Phillip Ervin, who they claimed on waivers in December, was a starter by default. By signing there, Pederson will likely be answering the biggest unknown about his game: can Joc hit lefties? Read the rest of this entry »

For years, rumors have connected Nolan Arenado and the St. Louis Cardinals. Some of it was wishcasting — Cardinals fans have spent the last 25 years expecting (and often seeing) trades for unhappy superstars, and Arenado sure seemed unhappy. Some of it was actual interest — the Cardinals have been in the superstar trade market and the Rockies have been in the move-Arenado market at various points. Today, it’s happening: per The Athletic’s Ken Rosenthal, Arenado has been traded to the Cardinals for five players: Austin Gomber, Mateo Gil, Tony Locey, Elehuris Montero, and Jake Sommers.

The sticking point in any Arenado trade was always going to be capitalism. That’s painting with a broad brush, so let’s rephrase: there’s no doubt that Arenado is one of the best players in the game, but the vagaries of his contract and the math of surplus value combined to limit a potential return. Remember when Giancarlo Stanton got traded to the Yankees for essentially nothing? This would be like that, only potentially even worse.

Arenado is due $199 million over the next six years. That’s a large contract, as befits a player of his stature. If you value one win above replacement at around $8 million (my best estimate at present, though the error bars are huge given the pandemic), Arenado would need to produce roughly 25 WAR over the next six years to break even. We’ve got ZiPS forecasts for the next five of those years:

The numbers fall a little short, which is why finding a trading partner for Arenado has proved so elusive even as rumors of his availability persisted. That doesn’t even take into account a player option that would allow him to become a free agent after the 2021 season; it’s hard to trade a lot for a player who might not be on your team in a year’s time.

Those are the reasons that Arenado was a strange piece to fit in a trade. The counter? Arenado is an awesome player! He’s Nolan Arenado, for crying out loud. Over the last five years, he’s been the seventh-best position player in the game. At 29, he’s not a spring chicken anymore, but he’s still one of the best third basemen out there. Every single team in baseball would be improved by adding him, even if they had to shift a few pieces around to fit him in.

This weird dichotomy — excellent player, middling trade chip — explains the strangeness of this deal. Though the terms of the deal aren’t final, the Rockies are reportedly sending roughly $50 million to the Cardinals as part of the trade, and Arenado has agreed to defer some of his compensation to further sweeten the financial pot for St. Louis. The Cardinals gave Arenado an extra opt-out and an extra year reported at $15 million in exchange. There are all kinds of wild financial things going on in this deal, but let’s skip all that for now and focus on what St. Louis is getting on the field.

The highlight of this trade is pretty clear: the Cardinals just got a new best player on their team. The NL Central is up for grabs this year, and the four teams with a realistic shot at it have spent the offseason doing a whole lot of nothing. Adam Wainwright, who signed earlier this week, was the first player the Cardinals inked to a major league contract all offseason. Read the rest of this entry »

The White Sox were one of the most exciting teams in baseball last year; a youthful, exuberant squad that broke up the Minnesota/Cleveland hegemony in the AL Central with a solid pitching staff and an unending barrage of crushed, smoked, and blistered baseballs. They led the league in position player WAR, and it was a team effort — seven different Chicago players had more than 100 plate appearances and an above-average batting line.

Notably absent from that group: Yoán Moncada, the one-time top prospect in baseball. He still put together a solid season — he hit .225/.320/.385, good for a 96 wRC+, and played stellar defense at third base — but after his breakout in 2019, 2020 can only be viewed as a disappointment.

I’ve got good news for people who are hoping Moncada turns things around: I know one of the main contributors to the problem (well, two, actually, but we’ll cover the second at the end of the article). I also have bad news for people who are hoping Moncada turns things around: it’s the same problem as always, and one that I hoped he had put in the past. Moncada simply doesn’t swing enough.

If this doesn’t sound like a common problem to you, well, yeah, it’s not. We as fans (and analysts) want batters to have a “good eye,” to avoid swings at devastating secondary pitches that they can’t do anything with. That’s the downfall of many a prospect, but Moncada has never had that problem.

Every year of his big league career, Moncada has chased fewer pitches than league average. This isn’t some trick of the count, either. Most batters chase more frequently when they’re behind in the count. Moncada chases less:

Read the rest of this entry »

Ah, relievers. Can’t predict them, can’t live without them. Between the changing demands of a modern game and the fact that bullpen arms seem to fluctuate randomly between unhittable and unreliable, everyone always needs more relievers. Both New York teams, set at many other positions, made moves to bolster their bullpens yesterday. The Yankees are signing Darren O’Day, while the Mets are adding Aaron Loup (pending a physical).

Let’s address O’Day first. Only two days ago, the Yankees traded Adam Ottavino to the Red Sox for a bag of baseballs. Actually, it was worse than that: they traded Ottavino and a prospect and $850,000 to the Red Sox for future considerations. As Dan Szymborski detailed, the Yankees made that trade to dodge the Competitive Balance Tax, but doing so left a right-handed hole in their bullpen.

One thing that no one can dispute is that Darren O’Day is right-handed. That has, in fact, been his calling card for 13 major league seasons: O’Day breaks right-handed batters down, end of story. Over his lengthy career, he’s held them to a .248 wOBA, with a 27.5% strikeout rate doing most of the heavy lifting. His sidearm delivery is a rarity these days, and it turns righties into… well, into whatever you want to call Bobby Dalbec on this swing:

That goofy (though not in a skateboarding sense) arm angle turns an 86 mph fastball into a devastating weapon, a pitch that batters think will hit them in the leg before it explodes up and away. He complements it with a sweeping slider he commands well to his glove side, a useful counter when hitters start to adjust to the unexpected release point.

The last time O’Day allowed even league average production to opposing righties was in 2011, when he faced only 43 of them. ROOGY is an overused term — at this point, even LOOGYs hardly exist — but O’Day might be the rare pitcher who fits the bill.

By using O’Day strategically against righty-heavy patches of the opposing lineup, the Yankees hope to get a steady diet of strikeouts and weak fly balls. Unlike most sidearmers, O’Day works up in the zone, something which surely adds to batters’ confusion. It’s not so much the velocity, the location, or the delivery; the combination of everything is simply too strange to deal with.

You might think that a sidearmer throwing high in the zone to lefties — three batter minimum and all — would undo all the good that O’Day does against righties. You’d be right — O’Day has been brutal against lefties as his career has worn on. Since the beginning of the new lively ball era in 2015, he’s allowed 1.5 HR/9 against lefties, good for a 4.67 FIP (ERA isn’t really compatible with splits like these). For comparison, his FIP against righties over the same window is a stellar 2.61.

The onus is on the Yankees to find good spots to use such a situational reliever, but the opportunities will certainly be there. Consider the rosters of the Yankees’ three division rivals (sorry, Orioles). The Blue Jays signed righties George Springer and Marcus Semien to join righties Bo Bichette, Teoscar Hernández, and Vladimir Guerrero Jr., while the Red Sox have only three lefty batters on their roster. The Rays — well, yeah, the Rays will be a problem. Even then, though, sending O’Day out to face a dangerous righty with two outs will often be worth the gamble — he’s bad against lefties, but not enough to offset his mastery of righties.

At $2.45 million, O’Day doesn’t need to set the league on fire to meet expectations. The Yankee bullpen is strong at the top — Aroldis Chapman, Zack Britton, and Chad Green provide quantity and quality, and two of them are even lefties. If O’Day can contribute 40 to 50 innings of right-handed filth, the Yankees will be pleased — that’s Ottavino production at a quarter of the price.

Speaking of New York teams signing situational relievers, the Mets signed Aaron Loup, who will become the only left-hander in an already-excellent bullpen. Calling him reverse O’Day misses the mark — he throws harder and doesn’t display such extreme platoon splits. Still, though, bringing in a southpaw in an all-right-handed bullpen tells you what the Mets want from Loup: come in against opposing leftys, sit them down, and tread water against the righties.

Okay, fine, there’s one major similarity between Loup and O’Day:

Like his new borough neighbor, Loup comes at hitters from a novel angle. Unlike O’Day, he lives in the bottom of the zone with a sinker. He complements his fastball, which sits around 92 mph, with a cutter, curve, and changeup that he uses almost exclusively against righties — the last time he threw a changeup to a lefty was in 2017.

The terms of Loup’s deal haven’t yet been disclosed, but they’ll likely closely mirror O’Day’s contract. So, too, will his role, though this time I mean mirror in the sense of the same thing in reverse. Loup will face dangerous lefties and then try to survive against the righties who follow them, shielding the Mets’ top relievers from the slings and arrows of outrageous Juan Soto highlights.

Neither of these deals are going to turn into wild, runaway success stories. Neither player is going to garner Cy Young votes. But teams need innings out of the bullpen, and both the Mets and Yankees are in competitive divisions. Filling those innings with quiet competence might be the difference in a game or two, and a game or two might be the difference in the playoff race.

How might these signings backfire? It all depends on what you mean by “backfire.” The most obvious downside is that O’Day and Loup might simply not be very good. O’Day throws a mid-80’s fastball and Loup is a 33-year-old reliever who struck out only 22.9% of opponents last year. It would hardly be shocking for one of these pitchers to be a roster casualty within the year — a few bad weeks, a pressing need for 40-man space, and that might be that.

Short of that, the downsides are all opportunity cost. If you’re out of the Loup market, you might be in the market for an exciting call-up from Triple-A. Giving innings to known and medium quantities is all well and good, but it lowers your odds of making exciting discoveries with that roster spot. The odds of O’Day turning into the next hot reliever du jour are essentially nonexistent.

For two presumptive playoff teams, however, that’s a negligible downside. It’s fun to discover new young relievers, but the downside is no joke: they might be bad! For teams far from contention, volatility is good. If you’re right in the thick of things, though, reliever volatility is definitely not where you want to be. By lowering their odds of failure, the Yankees and Mets are increasing their chances of success. Not bad for two sidearmers.

The Blue Jays had already made a splash in free agency, signing George Springer to a six-year deal last week. They added to their haul yesterday, signing Marcus Semien to a one-year, $18 million contract, as Jeff Passan first reported.

Most of the deals that have gone through so far this offseason have exceed both Craig Edwards’ projections and our crowdsourced estimates. It’s been a slow offseason, sure, but not an abnormal one when it comes to the players who have actually signed. Semien breaks that trend, and it’s worth looking back at his career to see how we ended up here.

Stop your tape after 2018, and Semien looked like a competent but unspectacular regular. His batting line was almost metronomic — 97 wRC+ in 2015, 98 in ‘16, 97 in ‘17, and 97 again in ‘18. There were glimmers of something interesting going on — his strikeout rate kept dipping, he increased his contact rate without sacrificing power, and he put the ball in the air to the pull side frequently. Still, at some point you are what you are, and Semien looked like an average hitter.

One very interesting thing happened to Semien in 2018, however. He’d long been regarded as a defensive liability, both by the eye test and by advanced defensive metrics. From 2013 to 2017, DRS pegged him as 8 runs below average at shortstop, while UZR was far more pessimistic at 20 runs below average. Worse than average (for a shortstop) with his glove, roughly average with his bat — Semien looked like a league average player, a nice but forgettable piece for the A’s.

In 2018, Semien’s defense suddenly improved. It’s possible that it was already headed that way, that opinion (and noisy statistics) lagged reality. In 2015, the A’s went full Brad-Pitt-in-Moneyball and brought in Ron Washington to teach Semien defense, and it worked. Read the rest of this entry »

If you follow the work of Alex Chamberlain at all, you’ve heard of the value of launch angle consistency. I’m not going to recapitulate his body of work on the subject, but briefly: hitters with tighter launch angle distributions routinely run higher BABIPs, and you can think of launch angle consistency as roughly a proxy for “hit tool.”

Most of this comes down to avoiding terrible batted ball outcomes. The two worst things you can do when you put the ball in play are to hit it straight down or straight up. Given that balls are, on average, hit mostly forward and with a tiny bit of loft — breaking news, I know — launch angle consistency is a great proxy for how often you avoid those, because the more -80s and +80s you put in your sample of mostly 10s and 20s, the higher the standard deviation gets.

One thing I’ve often wondered is whether this idea of consistency holds up for subsets of batted balls. Intuitively, it seems like it might. Take hard-hit balls, for example. If you’re hitting the ball 95 mph or harder, you really don’t want to squander it by hitting the ball on the ground or straight into the air. The distribution peaks at 30 degrees, but anything between 10 and 35 is a solid outcome.

With this in mind, I decided to look for batters who grouped their hard-hit balls most tightly. Having a narrow distribution seems like a great way to maximize good outcomes. Which player, you ask, has the tightest launch angle consistency (I’m just using standard deviation here) on hard-hit balls? I’m glad you asked — it’s Dee Strange-Gordon. Read the rest of this entry »

Read the rest of this entry »

When the Padres traded for Jurickson Profar before the 2020 season, they had a hole at second base. By the time the season started (give or take a week), Jake Cronenworth had filled that hole. But luckily for the Padres, Profar was flexible. He played the outfield for the majority of the season, more than doubling his career innings played total on the grass, and backed Cronenworth up at second while putting together the best batting line of his career. In a shortened season with heightened injury problems, his flexibility was exactly what the team needed.

On Friday, the Padres and Profar agreed to reunite, with San Diego signing him to a three-year, $21 million deal that includes opt outs after each of the first two seasons. But while Profar is headed back to southern California, what role he’ll play there remains undecided. A Padres team without many holes has spent the offseason filling in what cracks it has, leaving precious little space for more cooks in the kitchen — or so it seems.

One of the greatest unknowns facing NL teams is the DH rule. Will it come back next season? Opinions vary, and whether you can give an extra player at-bats changes roster construction significantly. The pre-Profar Friars straddled the gap between building for an extra hitter and for traditional rules. Ha-seong Kim, their prize position player signing this offseason, currently profiles as a super-utility player who starts on the bench. He could fill the DH position, but using a middle infielder (Kim is a shortstop by trade) there feels wasteful. Meanwhile, the team’s two corner outfielders, Tommy Pham and Wil Myers, are both mixed in the field. Either of them could slide to DH — Pham played DH during his tenure in Tampa — if the team could find a suitable defensive replacement. Read the rest of this entry »

Hey there! I want to give you a heads up about this article, because it doesn’t fit into a normal genre I write. Today, I won’t be telling you some new insight about a player you like, or creating some new nonsense statistic that tries to pull meaning from noise. This is a story about how baseball analysis is changing right before our eyes. A group of scientists and baseball thinkers are redefining the way we think about pitch movement, and I think it’s worth highlighting even if I don’t have anything to add to the conversation yet, because this new avenue of research is going to be front and center in Statcast-based analysis over the next few years.

“Seam-shifted wake,” as Andrew Smith, a student of Dr. Barton Smith (no relation) coined it, is a source of pitch movement that the first attempts at understanding the physics of a pitched baseball overlooked. It has already changed the way that coaches and pitchers approach pitch design, and due to recent data advances, it’s about to be everywhere. So let’s go over how we got here, to this newly observable way that pitchers deceive hitters, by starting at the beginning and working forward.

At its core, baseball is a game about one person trying to throw a ball past another person. There are other trappings — bases and baserunners, umpires, a strike zone, the mythology of Babe Ruth, and a million other sundry things. At the end of the day, though, everything starts with the pitcher trying to throw a ball past the batter.

Accordingly, baseball analysis over the years has focused on describing the flight of that ball. For a time, that simply meant describing the shape of pitches — they don’t call them curveballs for nothing. The next step was velocity — radar guns let us appreciate fastballs numerically rather than merely aesthetically.

In the past 15 years, the amount and scope of pitch-level analytical data has exploded. First, PITCHf/x quantified pitch location and movement. When we report a pitcher’s chase rate or how often a batter swings at pitches in the strike zone, it’s because the location where each pitch crosses the plate is recorded and logged. When we say a pitcher has eight inches of horizontal break on their slider, it’s because new technology allows us to measure it.

When Statcast debuted in 2015, it added another wrinkle: radar tracked the spin rate of each pitch in flight, putting a numerical value on something that had previously been only qualitative; a pitcher’s ability to generate movement through spin. Doctor Alan Nathan has written several authoritative studies discussing the value of this spin data. Read the rest of this entry »

As the most physically demanding position on the diamond, catcher is fundamentally different than the other non-pitching positions. Combine the need for frequent rest and the higher likelihood of injury, and every team is always in search of more catcher depth. There’s a corollary to that, though: because catching exacts such a toll on the body, few catchers are truly standout stars in the same way that infielders and outfielders are. As an idle example, four catchers were worth 3 WAR or more in 2019, and 66 non-catcher position players crested that mark.

Why bring up this fact? Part of the reason is that it’s interesting to me, and I get to pick what I write about most of the time. The bigger part, though, is that I don’t always get to pick what I write about, and this one happens to be a fortuitous combination of the two: the Astros signed Jason Castro to a two-year, $7 million dollar deal with incentives that could tack on $2 million, and somebody needs to write it up.

At first glance, Castro is exactly the kind of catcher that teams always need: he may not be an All-Star (though he was in 2013), but he’s someone you can count on to punch the clock roughly every other day, delivering enough receiving, enough hitting, and enough being-there-ness to fill roughly half of a catcher platoon. Deals like this are evergreen — heck, Martín Maldonado signed roughly the same deal in Houston last year, and he’ll be Castro’s platoon partner. That said, Castro carries a few interesting notes that give him a chance to be more than just another faceless backstop.

First and foremost, Castro is a lefty. That’s not exactly breaking news — stop the presses, I watched a Jason Castro at-bat and found something new — but it’s indisputably valuable. There simply aren’t many left-handed catchers, even if you count switch hitters; lefties made 1,399 plate appearances at catcher in 2020, as compared to 5,272 right-handed plate appearances. That’s a 21% share of PAs, as compared to a 43% share for lefties in the league as a whole. Read the rest of this entry »