Baseball is a game all about decisions. Some are minuscule, micro-level decisions that everyone will forget about after they happen. Should I sit fastball on this pitch? Should I take off for second base? Meanwhile, some are much larger, macro-level decisions felt over the course of one or multiple seasons. Should I try to lift the ball more? Should I change the grip of my slider? Everyday games over the course of a long season let us keep track of these larger trends, but no one could possibly analyze every substitution or pitching change over a 2,430-game regular season. So, instead, I’ll look at just three. In a midweek series last week, the Phillies and Giants put on a clinic of cat-and-mouse strategy and mostly excellent pitching. Let’s take a look at both the small- and large-scale decisions that contributed to this excellence on the mound.

Game 1 was a relatively high-scoring affair in which neither starter shined. There was nothing interesting to report from the Phillies side, as backend starter Taijuan Walker completed six innings but allowed as many runs. Opposite him was the struggling Blake Snell, who, in his typical inefficient fashion, lasted just four innings before being removed. To begin the fifth, manager Bob Melvin turned to rookie Randy Rodríguez, a sensible choice given his consistent multi-inning appearances to provide length to the Giants bullpen. In his first inning, Rodríguez retired the heart of the lineup in order on just 10 pitches, making him the easy choice to come back out for the sixth, due to face a pair of Phillies platoon hitters inserted into the lineup to face Snell.

Pache and Merrifield really aren’t guys you want hitting against a righty, especially one as nasty as Rodríguez, whose absolute hammer of a slider creates a difficult look for same-handed batters. Despite Marsh and Stott, the regular starters, ready to pinch-hit, Phillies manager Rob Thomson elected to keep them on the bench in a one-run game. His reason was the man standing on a bullpen mound beyond the center field fence: Lefty Erik Miller was warming up for the Giants.

While the Giants could have sent in Miller in response to a pinch-hitter, I still think using Marsh and Stott would’ve been the correct decision for Thomson. First, given Pache and Merrifield’s futility against right-handed pitching, almost any other scenario would have been more favorable. Indeed, the two managed a fly out and groundout against Rodríguez, combining for an xBA of .090. Furthermore, with lefty sluggers Kyle Schwarber and Bryce Harper at the top of the lineup (with a 91 and 72 point gap in projected OPS, respectively, between their splits vs. right-handed and left-handed pitchers), it would’ve been wise for Thomson to force Melvin to burn one of the two lefty relievers in the Giants bullpen, which could’ve led to more favorable matchups later in the game. Because Thomson decided not to make any substitutions, Miller wasn’t needed until the next inning, a scoreless effort in which he allowed just one hit, the popup single in front of home plate that Ben Clemens wrote about in Friday’s Five Things column. Marsh and Stott did eventually hit in the ninth, as did lefty bench bat Kody Clemens, but only after Philadelphia’s deficit had ballooned to four runs.

The fact that Miller only threw one inning in Game 1 became significant the next day, as he was fresh enough to slot in as the opener for bulk man Spencer Howard, a former Phillies top prospect who stalled upon hitting the majors and entered play with a career ERA north of seven. Thomson rolled out the lefty-heavy lineup hoping to feast on Howard’s mediocre fastball shape, so for the second day in a row, Miller faced the Phillies’ top three without allowing any damage. In traditional opener games, Howard would come out next and make his start as normal. Instead, Melvin went a different route, delaying Howard’s entrance in favor of bringing in Taylor Rogers, the only other available lefty he had. It’s not the first time a team has used multiple openers, but it’s certainly unorthodox during the regular season, with few off-days to rest the staff. The left-handed Rogers twin breezed through two scoreless innings, turning the lineup over before handing the ball off. Howard still had to get the job done, but Miller and Rogers lessened his load by nine outs, taking out a lefty-vulnerable lineup that wouldn’t turn to pinch-hitters so early in the game. Howard turned in four scoreless frames, and his team needed every bit of it, as they won 1-0 in extras.

Melvin’s management of his staff made the most of his available, although depleted, personnel. Under ideal circumstances, teams wouldn’t use emergency bulk arms, multiple openers, or an entire staff composed of swingmen, but an open rotation spot due to injury forced the Giants to scrap together innings by any means necessary. While Melvin’s tactical decisions were the best use of his limited arms, the opposite side of this matchup showed a fully operational, elite rotation at its finest. The Phillies currently have the best starting pitching in the league by every measure, and it’s not particularly close.

Most of that value comes from four excellent arms, two of which appeared in this series. First, in the second game, it was Zack Wheeler, who has continued his run as baseball’s most consistently excellent starter over the past half-decade. Even with his velocity finally starting to show signs of age, he’s on pace for career bests in ERA (2.32) and xERA (2.60), and his 29.0% strikeout rate is just below the career-high 29.1% mark he posted in 2021. Much of his success has come from an eagerness to change his approach and arsenal over time – first emerging as a Cy Young finalist after embracing the power of the elevated fastball, then adding a new pitch to his arsenal in each of the last two seasons. In 2023, a sweeper became his breaking pitch of choice; this season, like many other pitchers, he’s added a splitter. Wheeler now throws six pitches with regularity, a re-invention of his style from just a few years ago.

In dominating the Giants, Wheeler demonstrated the complementary power of his sinker and new split, with the former earning called strikes at a 29% clip and the latter inducing four whiffs on just 10 uses. The splitter has above-average run just like his two-seamer; it even spins on the same axis after adjusting for seam-shifted wake. It’s almost as if Wheeler precision engineered his splitter to travel on the exact same tunnel as his sinker for the first 40 feet of flight before diverging, making it extremely difficult for batters to tell them apart. The brand-new splitter is already Wheeler’s best secondary offering by run value, and it’s also helped make his sinker considerably more effective, with a 40-point drop in xwOBA compared to last season.

Wheeler put together one of his best starts of the season, striking out nine San Francisco hitters across six scoreless innings, but he couldn’t outdo his opponent’s parade of openers and was saddled with a no-decision. The next afternoon, in the series finale, Cristopher Sánchez enjoyed a Phillies offensive outburst that was absent from the first two games. In last year’s breakout campaign, the lefty Sánchez put up above-average numbers over 19 appearances, but what held him back from excellence was an abysmal showing against right-handed hitters, who ran a slugging percentage that was more than double their that left-handed counterparts. He’s leveled up this year, currently holding a share of the NL lead in FIP. And while he still runs an exaggerated platoon split, he’s been able to limit the power of opposite-handed hitters, as seen on Wednesday against a daunting all-righty Giants lineup.

The calling card of Sánchez’s arsenal is a changeup with few comps in terms of movement, boasting 97th percentile drop and 95th percentile run. This exceptional pitch generated gaudy whiff numbers during his time as a prospect, and has only continued in the big leagues. The problem is that Sánchez’s sinker, which he uses to set up the changeup, gets absolutely hammered, especially by righties. Drastically cutting his sinker usage wouldn’t be the solution, because that would allow batters to sit on his change and make it more hittable. So, rather than shelving the sinker, Sánchez made a change to when he used it.

Sánchez took advantage of the Giants’ passivity on first pitches by throwing juicy sinkers to 12 of the 24 batters he faced; none of them were put into play. In fact, over a third of his sinkers in the game were taken for called strikes, his highest mark of the season. After getting ahead in the count, Sánchez then let the changeups rain down, racking up strikeouts and groundouts. By the end of the start, Sánchez’s sinker — a pitch that had allowed loud contact like no other in the past — surrendered zero barrels and zero extra-base hits. Like Wheeler the day prior, Sánchez turned in six scoreless innings, while the Philadelphia bats knocked around the surprisingly hittable Kyle Harrison. The vulnerability of Sánchez’s sinker likely caps his upside as a mid-rotation guy, but certainly one more than capable of starting playoff games for his contending team.

The Giants won the series, taking two games out of three. They showed they could win even with a starting rotation depleted by injury and underperformance, tilting the odds in their favor with crafty personnel decisions that kept the Phillies’ offense guessing as to who would come out next. (Of course, over the weekend, the Giants were swept by the Yankees in San Francisco, perhaps displaying the limitations of a team with a shaky staff.) On the other side, Philadelphia’s buzzsaw of a rotation was created by decisions as well, albeit ones made on the more macro level. From arsenal tweaks to command improvements, these changes demonstrate why this team is top dog right now in the National League.

Matt Vierling has been swinging a hot bat with the Detroit Tigers. Over his last 11 games, the 27-year-old third baseman/outfielder is 16-for-41 with four doubles, a triple, four home runs, and 13 RBIs. His slash line over the span is .390/.435/.829 bringing his seasonal mark to a solid .292/.324/.509. While by no means an offensive force, he has nonetheless been an integral part of the lineup. Since being acquired by Detroit from Philadelphia prior to last season as part of the five-player Gregory Soto swap. Vierling has the second-most hits (175) on the team, and a respectable 106 wRC+.

Defensive versatility adds to Vierling’s value — his big-league ledger includes games at 3B, 2B, CF, RF, and LF — and there is a chance that another non-DH position could eventually be added to the list. Given the right circumstances, he might even pitch. It would be familiar territory. Vierling thrived on the mound as a prep, then was a two-way player at the University of Notre Dame from 2016-2018.

A Perfect Game showcase in Minneapolis is a standout memory for the St. Louis, Missouri native. Vierling recalls Carson Kelly’s brother, Parker, being one of his teammates, while Ke’Bryan Hayes and Josh Naylor — “I pitched against him if I remember correctly” — were among his notable opponents. Playing well against that type of talent garnered him attention from colleges and professional scouts alike, and while his bat showed promise, it was the arm that stood out the most. Read the rest of this entry »

If you read the 2,300-word NCAA Tournament preview from yesterday, you probably noticed that it only included eight regionals and 32 teams, which is only half the field. That’d leave newcomers woefully unprepared for the bacchanal of college baseball that is to come. So join me for a quick look at the other 32 teams that will set out to claim a spot in the Men’s College World Series. Remember: The goal is 150 words per region. Let’s see if I can do it this time. Read the rest of this entry »

Below is an analysis of the prospects in the farm system of the Washington Nationals. Scouting reports were compiled with information provided by industry sources as well as our own observations. This is the fourth year we’re delineating between two anticipated relief roles, the abbreviations for which you’ll see in the “position” column below: MIRP for multi-inning relief pitchers, and SIRP for single-inning relief pitchers. The ETAs listed generally correspond to the year a player has to be added to the 40-man roster to avoid being made eligible for the Rule 5 draft. Manual adjustments are made where they seem appropriate, but we use that as a rule of thumb.

A quick overview of what FV (Future Value) means can be found here. A much deeper overview can be found here.

All of the ranked prospects below also appear on The Board, a resource the site offers featuring sortable scouting information for every organization. It has more details (and updated TrackMan data from various sources) than this article and integrates every team’s list so readers can compare prospects across farm systems. It can be found here. Read the rest of this entry »

For the last few years, I’ve been checking the accuracy rate of the ball-strike calls made by umpires, dividing the number of correct calls by the total number of takes. It’s a blunt approach, but because umpires make so many thousands of calls each year, it yields solid results. On Tuesday, I pulled the numbers for the 2024 season, and I found something I didn’t expect: Accuracy is going down rather than up. In every single season since the beginning of the pitch tracking era in 2008, umpires have gotten better at calling balls and strikes according to the Statcast strike zone. This is the first time I’ve ever pulled the numbers and seen a lower accuracy rate. However, this is also the first time I’ve checked the numbers this early in the season, and it turns out umpires tend to make better calls as the season goes on. Since 2017, accuracy in March, April, and May has been 0.19 percentage points lower than accuracy over the full season (though the difference in 2023 was just 0.03 percentage points). Here’s what that looks like in a graph.

You know how at the beginning of every season, there are a couple blown calls during a nationally televised game (or at least, calls that appeared to be wrong according to the on-screen strike zone), and certain people start complaining that umpires are terrible and they’re getting worse? Those people always catch me off guard. I usually forget about the missed calls when the season ends, but those people somehow manage to keep their umpire anger at a high idle through the entirety of the offseason so that the instant baseball returns, they’re ready to shout about the umpires again without any need to ramp up. I don’t know how they do it without pulling an oblique, but in a sense, those angry people are right. Even though the umpires are always getting better year after year, they’re nearly always more accurate toward the end of the season than at the beginning — so much so that when the season starts, they’re worse than they were at the end of the previous season. For a month or two, the umpires really have gotten worse. We often say early in the season that pitchers are ahead of hitters. It turns out they’re ahead of umpires too.

For each season, I broke down the overall accuracy in two-month increments, essentially dividing the season into thirds. I also broke down the accuracy during spring training and the playoffs, although there are plenty of factors that make those numbers suspect. During spring training, the umpiring pool is much wider. Perhaps more importantly, there are far, far fewer tracked pitches during spring training, both because the number of games is so small and because not every stadium is set up for Statcast. That results in a much smaller, much less reliable sample. The playoffs are also a much smaller sample, but they’re also, at least in theory, selecting for better umpires. Working the playoffs is seen as an honor and a reward for performing well in the regular season. We should expect accuracy to be at its lowest during spring training and highest during the playoffs.

Generally speaking, the results fit our preconceptions. Spring training accuracy is very low and it features the volatility that we’d expect from a small dataset. Umpires are also more accurate in the playoffs. The red line is March, April and May, and as you can see, it’s nearly always below everything but the spring training line. Not only do umpires start getting better in June, but they keep getting better right through the end of the season, which is why the light blue line for August, September, and October is usually above the yellow line for June and July. The trend is a little bit easier to see if we focus just on pitches in the shadow zone, the area that’s one baseball’s width from the edge of the zone on either side.

In the graph above, the dotted line represents that season’s overall accuracy on calls in the shadow zone. Each data point represents the number of percentage points above or below that year’s average. Not only do the calls get better as the season goes on, there’s a definite gap between the first two months and the rest of the season. Umpires are decidedly worse in those first two months. However, 2023 was a real outlier. It was first time since 2008 that umpires were more accurate in the beginning of the season than the end.

With that, I want to bring you back to 2024. So far this season, umpires have gotten 92.46% of calls right, down from 92.81% in 2023 and just two thousandths of a percentage point higher than in 2022. Based on everything I’ve shown you, we should expect umpires to get better over the rest of the season. However, the drop-off from last year is noticeable. Accuracy over the first two months of the season has only fallen once before, from 2009 to 2010, when it dropped by 0.16 percentage points. So far this season, accuracy has fallen by twice that amount: 0.32 percentage points. That’s a tiny change, on the order of one call per game, but that doesn’t make it any less real. We’ll have to wait and see how the rest of the season goes, but perhaps this year really could end up being different. Or, if it follows the pattern of the past decade and a half, accuracy will soon be in its way up.

Statcast’s new public repository of bat tracking data has been out for a few weeks now. Like every number manipulator with a sense of curiosity and middling technical skills, I’ve been messing around with the data in my spare time, and also in my working time, because messing around with data is both my job and hobby.

Mostly, I’ve been reaching some conclusions that mirror what others have already shown, only with less technical sophistication on my part. This article by Sky Kalkman does a great job summing up the biggest conclusion: Pitch location and spray angle (pull/oppo) influence swing length so much that you probably shouldn’t quote raw swing length. But I thought I’d look for something slightly different, and I think I found something.

Here’s the high level conclusion of my search: When pitchers throw harder fastballs, hitters slow down their swings to compensate. It sounds counterintuitive. Shouldn’t hitters speed up their bats to try to get to the faster pitch? But I had a hunch that this wasn’t the case. If you listen to hitters describe their approach against flamethrowers, they focus on shortening up and putting the ball in play. “Shortening up” might sound like it describes swing length, but it also surely describes swing speed. A hitter who is just punching at the ball likely won’t swing as hard as one trying to launch one. If you’re prioritizing having your bat on plane with the ball as long as possible, you probably aren’t focusing as much on raw speed. Read the rest of this entry »

The Portland Sea Dogs roster includes three Top 100 prospects, but neither Roman Anthony (15), Marcelo Mayer (42), nor Kyle Teel (83) has been the Double-A affiliate’s best player so far this season. That distinction belongs to a 23-year-old, shortstop-turned-left-fielder whom the Boston Red Sox drafted 69th overall in 2019 out of the Carlos Beltran Baseball Academy. Along with playing stellar defense at a new position, Matthew Lugo is slashing .306/.404/.653 with 10 home runs and an Eastern League-best 191 wRC+.

Markedly-improved plate discipline has played a big role in his breakout. Last year, Lugo logged a 5.9% walk rate and a 27.6% strikeout rate. This year those numbers are 13.4% and 22.5%.

The key to his newfound ability to dominate the strike zone?

“Timing,” explained Lugo, who takes his cuts from the right side. “Last year, I had a lot of movement with my hands, which made me inconsistent being on time with the pitcher. My hands were very low, and then when I got to the launch position they were very high; there was a lot of distance for my hands to go through. This year, I’m closer to my launch position before I swing. I also had a [bat] wiggle and this year I just get to my spot with no wiggle. I’m getting into my spot early and have more time to see the pitch, so I’m making better swing decisions.”

The decision to move Lugo off of his natural position and into an outfield corner wasn’t based on defensive shortcomings, but rather on the arrival of Mayer. The high-ceiling shortstop was promoted to Portland last year on Memorial Day weekend, and given his first-round pedigree, he wasn’t going to be the one moving. Read the rest of this entry »

Below is an analysis of the prospects in the farm system of the New York Mets. Scouting reports were compiled with information provided by industry sources as well as my own observations. This is the fourth year we’re delineating between two anticipated relief roles, the abbreviations for which you’ll see in the “position” column below: MIRP for multi-inning relief pitchers, and SIRP for single-inning relief pitchers. The ETAs listed generally correspond to the year a player has to be added to the 40-man roster to avoid being made eligible for the Rule 5 draft. Manual adjustments are made where they seem appropriate, but we use that as a rule of thumb.

A quick overview of what FV (Future Value) means can be found here. A much deeper overview can be found here.

All of the ranked prospects below also appear on The Board, a resource the site offers featuring sortable scouting information for every organization. It has more details (and updated TrackMan data from various sources) than this article and integrates every team’s list so readers can compare prospects across farm systems. It can be found here. Read the rest of this entry »

Welcome to another edition of Five Things I Liked (Or Didn’t Like) This Week. By now, you surely know the drill. I credit basketball genius Zach Lowe for creating the format I’m using, make a few jokes about how much baseball I get to watch to write this column, and then give you a preview of what you can read about below. This week’s no exception! I get to watch a ton of baseball, and this week I watched a lot of birds and a lot of bunts. I also watched a lot of the Pirates, just like I do every week. Let’s get right into it.

1. Reversals of Reversals of Fortune

For most of the 21st century, no one would bat an eye if you told them the Cardinals swept the Orioles. The Cards have been good pretty much forever, and the O’s went through a long dry period. But starting last year, things have changed. The Orioles last got swept in early 2022, and they’ve been one of the best teams in baseball since then. The Cardinals fell on tough times after 2022’s Molina/Pujols swan song season. Coming into their series this week, the O’s had the second-best record in the AL, while the Cardinals languished near the bottom of the NL at 20-26.
Read the rest of this entry »

On the first knuckleball thrown at Coors Field in 16 years, Matt Waldron hit home plate umpire Bill Miller right in the nuts.

Nobody — not Waldron, not his catcher Kyle Higashioka, not Miller — appeared to know where the ball was going. Despite Higashioka frequently (and understandably) struggling to track the flight of the ball throughout the rest of the night, Waldron delivered a career-best performance, allowing just one run over six innings.

Perhaps the most surprising part of his performance was the setting. Since 2008, knuckleballers have dodged outings at Coors Field, which sits 5,200 feet above sea level. Conventional wisdom dictates that knuckleballs at altitude are a bad idea, as Cy Young-winning knuckleballer R.A. Dickey told Dave Krieger back in 2012. Read the rest of this entry »