Read the rest of this entry »

While there’s still a bit of baseball left to be played, this is always the time of the year when I dissect the current season’s ZiPS projections. Baseball history is not so long that we suffer from a surfeit of data, and another season wrapped means more for ZiPS to work with. ZiPS is mature enough at this point that (sadly) the major sources of systematic error have been largely ironed out, but that doesn’t mean that the model doesn’t learn new things from the results.

Last week, we looked at the team projections. Now, we turn our eyes to the hitters. Given the length of the 2020 season, the accuracy and bias of hitters’ projections this year likely offer fewer broadly applicable lessons, but they can still help us learn something about how projections ought to treat truncated seasons.

The first thing I can say with confidence is that, at least when it comes to ZiPS, there was no group tendency that could be gleaned from the projection errors. I assessed the errors using a variety of tools to see if certain types of players had more or less accurate projections or a 2020 tendency to over- or underperform the projections as a group. For instance, did fastball hitters fare better or worse? Did young players, or faster players?

The answer for these and other similar comparisons I looked at was no; none of these attributes had significant predictive value when it came to the magnitude of the errors or the bias of the projections. That’s good news in that 2020 didn’t feature any new calibration errors, but bad news in that we didn’t really learn anything new about short seasons. If, for example, my analysis had revealed that older hitters overperformed their projections as a group, it may have given us new insight into how aging players can better maintain their performance in 60 games rather than 162. On the whole, the errors were uncorrelated in this manner. The exception was the usual one: players with shorter resumés had less accurate projections than players with longer ones, but that’s always the case. Read the rest of this entry »

Saturday night, the Rays and Dodgers played one of the wildest World Series games ever. Leads changed hands, runners slipped, pitchers crumbled, and the Rays walked it off in spectacular fashion. At the time, I criticized several managerial decisions, and I wasn’t alone. With the benefit of a few days of thinking, however, I wanted to look back at a few key decisions each manager made and decide whether they were blunders or merely tough decisions that looked worse in hindsight.

For the Dodgers, the key managerial decision was the relief pitcher hierarchy. After a spectacular pitching performance from Walker Buehler the previous night, Dave Roberts had the entire bullpen available. His first decision came with two outs in the fifth inning, when Julio Urías began his third trip through the Rays’ lineup. Urías had been up and down on the night; he had nine strikeouts, but he’d also allowed some loud contact and two home runs. The Rays stacked their lineup to challenge him; the first four hitters were all right-handed.

Roberts went to Blake Treinen, and I think that’s a reasonable choice. The Rays had a bench full of lefties, which means any stretch of righties in their lineup can turn into lefties at the drop of a scorecard. Despite that fact, however, Randy Arozarena probably wasn’t leaving the game, and guaranteeing a Treinen/Arozarena matchup, plus forcing Tampa Bay to use some left-handed pinch hitters, is as close to a positive platoon matchup as the Dodgers were going to get.

That leads us to a pivotal pitching change in the sixth: two runners on, one out, and Brandon Lowe stepping to the plate. Behind Lowe, the Rays had Willy Adames and Hunter Renfroe due up. In theory, that’s two righties and a lefty. In practice, Lowe is the only Tampa Bay hitter who the team couldn’t substitute. That left Dave Roberts with three decisions, in my mind — all of which he would have had to make several batters earlier to allow the pitchers time to warm up. Read the rest of this entry »

The pivotal and most crucial decision of Game 5 of the World Series was attended by a wave of boos, even as Dave Roberts got it right.

Amid the carnage and chaos at the end of Game 4 a scant 20 hours prior was the realization that the fulcrum of the series was now the left arm of Clayton Kershaw. That he would be the man on the mound was already known, as he’d been announced as the scheduled starter for Game 5 well before then, but the circumstances surrounding his turn swung as sharply as Game 4 itself. In the moments before Brett Phillips overturned the world, Kershaw was going to take the mound as the man to end Los Angeles’ three-decade run without a title. In the moments after, he became the man who would have to overcome his checkered postseason past to break the deadlock and put the Dodgers on the doorstep of a championship. If he couldn’t, Los Angeles would be facing the end of the road in Game 6.

It’s both unfair and tiresome that the playoffs always seem to swing around Kershaw, but he warps the series around him, a gravity well that sucks up matter and turns it into white-hot takes. There’s also the fact that the Clayton Kershaw Postseason Narrative™ has, for the most part, accurately reflected his October body of work, full of struggles and heartbreaking losses. The irony of these playoffs is that, one weak NLCS start aside, Kershaw has looked more like his regular-season self. Coming into Game 5, his 2020 postseason body of work consisted of eight runs allowed in 25 innings — a 2.88 ERA — and 31 strikeouts, and he was superb in Game 1, holding the Rays to one run in six innings. This is the Kershaw we all know and love. Read the rest of this entry »

8:02	Dan Szymborski: Good evening!

8:03	Dan Szymborski: I actually have something on this for the morning.

8:03	Dan Szymborski: Every playoff series has an awkward narrative.

Read the rest of this entry »

The 2004 movie Primer is widely considered the most complicated movie plot of all time. Two engineers travel back in time again — and again — and maybe before?? — and again in an attempt to mold events to their own benefit. It’s a truly ridiculous, convoluted mess — and it pales in comparison to what the Dodgers and Rays did last night in Game 4 of the World Series.

Let’s begin at the beginning. Ryan Yarbrough took the mound for the Rays, on three days’ rest after a relief appearance in the first game of the series, and he wasn’t sharp. He surrendered solo home runs to Justin Turner and Corey Seager, and scattered three other hits and a walk while striking out only one batter. He was out of the game in the top of the fourth.

Julio Urías, his counterpart, flirted with brilliance. He struck out nine Rays out of the 18 he faced, bullying the opposing lineup to the tune of 20 swinging strikes. Tampa Bay whiffed 17 times on his fastball alone, and his curveball accounted for another 10 called strikes. Naturally, the Rays tagged him for two home runs — a Randy Arozarena first-pitch ambush and a full-count moonshot from Hunter Renfroe. The Dodgers had added a run in the top of the fifth, so Urías left with a 3-2 lead.

LA added another run in the sixth inning,, and the game felt like it might start getting away from Tampa Bay in a hurry. The Dodgers bullpen isn’t airtight, but the Rays’ own bullpen hadn’t been able to slow down opposing hitters all series, and they were running out of good options to fill innings. What was the offense going to do, score six runs in four innings or something? Read the rest of this entry »

Brad Keller had a boffo season for the Kansas City Royals, and his slider was a big reason why. Buoyed largely by its improvement, the 25-year-old right-hander logged a 2.47 ERA and a 3.43 FIP over nine starts covering 54-and-two-thirds innings. Five times, Keller worked five or more scoreless frames, a complete-game shutout in mid-September serving as his shining-star effort.

Helped by pitching coach Cal Eldred, he jumpstarted his career by developing more depth during his pandemic-forced downtime.

“We made some adjustments during the shutdown,” Keller told me following the completion of the season. “Between spring training and spring training 2.0 we made some mechanical adjustments that allowed my arm to become more athletic, if that makes sense. That’s kind of a weird way to put it, but whenever I would throw my slider in the past, I’d almost block my arm out. We were like, ‘OK, we don’t do that on a fastball, we don’t do that on anything else, so let’s do that same thing on the slider.” Basically, I needed to start throwing my slider just like I throw my fastball.”

The adjustment took time to bear fruit. Initially, the pitch wasn’t breaking at all. As Keller put it, “the very first one almost took the catcher’s head off,” as it was devoid of downward movement. Diligence, accompanied by a Rapsodo and an Edgertronic, eventually did the trick. Once mundane, his slider morphed into a monster.

“With the help of analytics, it became like my fastball for a longer time toward the plate,” explained Keller. “The spin went up. It became sharper, and as a result I started getting some silly swings-and-misses on it.” Read the rest of this entry »

Read the rest of this entry »

I’ve been thinking about distance a lot lately. The space we must keep from each other, the proximity of the most turbulent election of our lifetimes, and how the former often exacerbates the stress of the latter.

Baseball cannot provide a complete escape, of course, and the specter of distance loomed again prior to the start of Game 3. Just before first pitch, I couldn’t help but wince as the camera panned around a not particularly distanced crowd under the roof of Globe Life Field. Responsible countries with far fewer cases have maintained much stricter attendance measures at sporting events. Here in the U.S., there may be good reasons to allow 11,447 people into a big league ballpark right now, but they evade me.

To add another uncomfortable variable, a rainy forecast prompted the powers that be to close Globe Life Park’s retractable roof. I’m not really sure whether the closure made the stadium any more dangerous, but it certainly couldn’t have helped. At least one writer stayed away from the pressbox, though the roof did nothing to diminish gatherings down the first and third base lines. With cases spiking around the country — up 21% in Texas over the past week — Tom Verducci’s hasty declaration that the league had concluded fans were no less safe with the roof closed didn’t inspire much confidence. Read the rest of this entry »

8:02	Jay Jaffe: Good evening and welcome to the chat! I’m popping in for a few minutes here but i’ll have to duck out soon t help put the kiddo to bed.

8:03	Jay Jaffe: It’s an odd coincidence that one of those Astros is again facing the Dodgers in the World Series. Morton was the guy who closed out Game 7 with four innings of one-run ball. He obviously wasn’t hitting but he’s said he was aware of the trash can banging

8:04	Jay Jaffe: https://www.mlb.com/news/charlie-morton-on-astros-sign-stealing

Read the rest of this entry »