MLB’s plan to de-juice the baseball this year seems to have worked. Home runs were down in 2021 compared to the last couple of seasons, though not by so much as to warrant a complete shift in the game’s current offensive paradigm. Instead, run scoring — which remains heavily concentrated around home runs — decreased overall. Non-pitchers hit just .247/.321/.418 this year, representing the second-lowest batting average in the live ball era (1920-present and excluding 2020) but the fourth-highest isolated power.

In slightly de-juicing the baseball, MLB erased some home runs. But as we can see in the sudden drop in batting average, which is down nine points for non-pitchers compared to 2019, shaving off homers didn’t result in other types of hits. As I wrote in my second of two pieces analyzing early 2021 home run trends, these lost homers mostly just became outs. That explains the significant reduction in overall offense, even as the league-wide home run total remained quite high in the context of baseball history.

With the season now officially complete, it’s time to revisit some of those early trends to get a final estimation of the effect of MLB’s de-juicing. Of course, there is a significant, potentially confounding, variable that makes 2021 different from other full seasons and complicates our analysis: the midseason enforcement against the use of sticky stuff. I will try to account for that here, though it probably deserves its own standalone examination. Read the rest of this entry »

Editor’s Note: You can find the Dodgers and Cardinals Wild Card rosters and announced lineups here and here.

While it’s not the blood rivalry Yankees-Red Sox pairing of the AL Wild Card Game, the NL Wild Card matchup does not lack for story lines. The Dodgers are the reigning World Series winners, and despite tying the franchise record for wins (106), finishing with the majors’ best run differential (+269) and outperforming last year’s 43–17 juggernaut over their final 60 (45–15), they finished second to the upstart Giants by a single game, ending their eight-year run of NL West titles. They’re just the third 100-win team to wind up as a Wild Card, after the 2002 A’s (102 wins), who didn’t have to play a do-or-die game, and the 2018 Yankees (100 wins), who won theirs. That their season comes down to a single game despite their dominance over the long haul is either evidence that the current playoff format needs overhaul or that it’s perfect as is; you’re guaranteed to hear both points of view somewhere in the run-up to the game, and probably during and after as well.

The Cardinals (90-72) are the upstart comeback kids. Beset by injuries to an already-thin rotation, they were just 51–51 at the July 30 trade deadline, and their acquisitions of the well-shellacked Jon Lester and J.A. Happ drew more snickers than raves. They were below .500 as late as August 8 (55–56), at which point their Playoff Odds were a season-low 1.3%. Thanks in significant part to the league’s strongest defense and a suddenly-lively offense, they went 35–16 the rest of the way, better than all but the Giants (36–14) and Dodgers (39–11). While they were still just 69–68 as late as September 7, they embarked upon a 17-game winning streak, the longest in franchise history and in the NL since the 1935 Cubs won 21. The streak turned what looked to be a hectic five-team race for the second Wild Card spot into a laugher; St. Louis won going away, clinching on September 28 and outdoing the next-closest team, the Reds, by seven games. The 2.8% odds the Cardinals had on September 7 now stand as the lowest September mark of any team that has rallied to make the playoffs since 2014.

Beyond all of that and a marquee pitching matchup between Max Scherzer and Adam Wainwright, there’s the inevitable discussion of these two teams crossing paths in the postseason, where the Cardinals have gotten the upper hand four out of five times, leaving Dodgers fans smarting in the 1985 NLCS (Ozzie Smith, Jack Clark, Tom Niedenfuer) and the 2013 NLCS and ’14 NLDS (Clayton Kershaw, Hanley Ramirez, Matt Carpenter, and so on). That Kershaw wouldn’t have been the choice to start this one — he’s on the sidelines for October due to yet another bout of forearm discomfort — might only partially quell the anxiety of Dodgers fans given the continued presence of Wainwright and Yadier Molina. Oh, and Albert Pujols is here, too, albeit on the other side of the equation.

For as rich as those storylines may be, they’re not the same as actual analysis. There’s only so much one can do for a single game, but it’s worth touching on a few points. Read the rest of this entry »

We may have been robbed of tiebreaker madness, but this season’s playoffs still promise to deliver great matchups, with division rivalries, electric starters, potent bats, and a bit of devil magic thrown in for good measure. And though the field boasts a number of dominant teams that seem poised for deep runs, a lot can happen in a short series. That makes it difficult to predict how October will unfold, but 28 of our writers from FanGraphs and RotoGraphs answered the call.

Below are our predictions by league and round, as well as each writer’s complete forecast. Happy playoffs! Read the rest of this entry »

There was a moment on Sunday when Randy Arozarena had just stolen second base in the eighth inning of a scoreless game. Wander Franco stood at the plate while Nelson Cruz waited in the on-deck circle; the Yankees hadn’t yet recorded an out. Meanwhile, 250 miles down I-95, the Nationals had just wrapped up a three-run fifth, pushing their lead over Boston to four runs. Making his major league debut, effectively wild youngster Joan Adon struck out Rafael Devers on perhaps his best breaking ball of the day. The Blue Jays were cruising. This was the moment when extra baseball felt most likely. Perhaps not All of the Extra Baseball, because of the Mariners’ deficit against the Angels, but some. Instead, to the annoyance of baseball hipsters everywhere, we’re left with a boring ol’ Yankees/Red Sox playoff game at Fenway Park featuring two Cy Young candidates.

This is only the second time the two franchises have met in the postseason since their heated, knuckleball-crushing, curse-breaking epic tilts of the early 2000s, with the other coming when Boston dispatched the Yankees 3-to-1 in the 2018 ALDS, a series that featured many of the same players we’ll see Tuesday, though not the ones directly involved in that series’ extracurricular activity. It feels like we see these teams play one another on national TV constantly (it’s convenient to haul equipment from Bristol, Connecticut to either Boston or New York), but they’ve only faced off six times in the last two-and-a-half months. The Yankees won all of those games, including the last two in dramatic fashion (not that that means anything). Our announced starters finished the season ranked one-two in American League pitcher WAR: Gerrit Cole is set to take the mound for New York, while Boston will start 11-year veteran Nathan Eovaldi. Here are your starting pitcher scouting reports:

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Meg Rowley and guest co-host Craig Goldstein of Baseball Prospectus recap the final weekend of regular season baseball before previewing this week’s Wild Card games. They discuss the Mariners’ decision not to promote Julio Rodríguez, their disappointment at the lack of tiebreaker games, franchise player farewells, the current playoff format, what comes next for Seattle and Toronto, and what they’re most excited to watch in October. Then they turn their attention to the Yankees, Red Sox, Dodgers, and Cardinals, offering their thoughts on what each squad should feel confident and nervous about going into the play-in games. Finally, they try to solve the mystery of Hunter Renfroe’s defense. Read the rest of this entry »

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Saturday afternoon, Corbin Burnes made several uncharacteristic missteps. He walked Max Muncy on five pitches, only the 34th walk he’d issued all year. The next batter, Justin Turner, deposited a 3-1 cutter into the left field stands for a three-run home run, only the seventh Burnes had allowed all season.

He pitched another inning without incident, then — back in the lead in the ERA race after briefly falling behind Max Scherzer — came out of the game for good, his regular season now complete. That ineffective outing might worry Brewers fans for the playoffs, but it also emphasized how spectacular the rest of his year has been. Surrendering a walk and a home run? It happens to everyone — batters hit 5,944 homers this season, third-most in history, and walked roughly 9% of the time they came to the plate. But it doesn’t happen to Burnes — and that’s why he deserves to win the NL Cy Young this year.

There’s no single criteria for the most outstanding pitcher in the National League, but in my eyes, Burnes has claims on several axes, and no real warts. More than that, his 2021 season is a towering achievement, one that we’ll hear about in 20 years when we talk about the best pitching seasons in history. Read the rest of this entry »

Every season, we brace ourselves for the inevitable decline of baseball’s stars of yesteryear. Unfortunately, we’re all getting older, and despite their rare talents and athleticism, major leaguers eventually lose production. But while each individual has their own rate of decline, generally speaking, we know a fair amount about how age affects hitters’ abilities: A typical player peaks around age 26 and gradually declines afterward in what we know as the age curve. For those fortunate enough to stick around into their late 30s. that decline becomes quite sharp.

The basis for the age curve is the difference between a player’s performance across two different seasons. The choice metric for hitters tends to be wRC+, because it’s adjusted for league average and should be less impacted by league-wide trends and fluctuations from one season to the next. The chart below shows an age curve for players using data from the last 10 seasons, preceding 2021:

The shape of the age curve makes intuitive sense, for two reasons. The obvious one is that the primary skills needed to succeed in baseball (eyesight, strength, agility, etc.) decline as the human body gets older. Another, however, is that players only remain at the big league level if they’re successful. Whether it be due to injury, a slump, or even a little bad luck, a decrease in a hitter’s performance is an inevitability before they decide to retire (or the decision is made for them). Read the rest of this entry »

After a wild Sunday afternoon that held plenty of drama for the final day of the regular season, the postseason field is set. Team Entropy ultimately found no joy, with the remaining playoff spots finally decided without the need for tiebreaker games. With the Wild Card round set to begin on Tuesday, here’s a look at the 10 teams in the playoffs and how they stack up against each other.

A quick refresher: my approach takes the three most important components of a team — their offense (wRC+), and their starting rotation and bullpen (50%/50% FIP- and RA9-) — and combines them to create an overall team quality metric. Since regular season records don’t matter in the playoffs, I’ve ranked the teams simply by their overall team quality, removing the factors for win percentage and expected win percentage.

The Dodgers and Giants spent the entire season battling each other for the NL West crown. Los Angeles won 50 games after the All-Star break to post the best record in the second half and only gained a single game on San Francisco. The closest the Dodgers were to overtaking the Giants was entering their series in San Francisco on September 3. Even though the division wasn’t actually decided until the final weekend, that series gave the Giants the edge they needed to secure their first division title since 2012. It’s a shame they’re lined up to face each other in a Division Series instead of the NLCS — should the Dodgers advance out of the Wild Card game, that is. Read the rest of this entry »

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