This is Part Two of a wide-ranging interview — the conversation took place on July 26 — with Seattle Mariners farm director Andy McKay. Part One can be found here.

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David Laurila: Given your background, do your player-development philosophies differ from most people in your role?

Andy McKay: “I don’t know, because I don’t spend a ton of time evaluating the others. I just know that my background as a teacher, and a mental-skills coach, is something that kind of sits in the middle of our department. Everything is important. What I mean by that is, you can make or break a player in the weight room, the training room, the batting cage, in a bullpen. You can make or break them with nutrition. All of those things are critical, and the mental skills component is what allows them to actually surface during competition. The fact that my background is heavy in mental skills, we probably prioritize that a little differently than most.”

Laurila: How does that mesh with your reliance on data?

McKay: “It’s a need for clarity. Mental skills should completely embrace tech. Why would we want to coach players with opinions when we can do it with evidence? What will better allow a player to be more confident, my opinion or evidence — you know, clarity or wishy-washy verbiage? So the two have melded very well together. Ultimately, we want to be the best in baseball at telling the truth. We want that to be our competitive advantage. Read the rest of this entry »

Editor’s Note: This research was completed while Charles Young was still a student at University of Illinois, Urbana-Champaign.

It’s hard to imagine that an obscure property of the baseball known as the “drag coefficient,” a quantity well known to physicists but hardly to baseball people, would become part of the baseball vernacular. But it has, thanks in no small part to the rapid increase in home runs in major league baseball over the past several years and the conclusion of many people that that increase is due to changes in this otherwise elusive drag coefficient (C_D). In fact, the committee of scientists and engineers commissioned by MLB to determine the causes for the recent surge in home runs found that the principal reason was a reduction in drag coefficients between 2015 and 2017. In a follow-up report, the committee found that the decrease in home runs in 2018 and the increase in 2019 were due, in part, to changes to C_D.

One remarkable finding was that a change in the average C_D value of a baseball by as little as 0.01 (about 3%) would change the distance of a fly ball on a typical home run trajectory by four to five feet, leading to an increase in home run probability of about 10-12%. Equally interesting was the finding that the ball-to-ball variation in C_D within a given season was large compared to the small shift in mean value needed to explain the home run surge.

While the primary focus of recent research has been on the evolution of mean values of drag coefficients, we are aware of no serious studies of how the ball-to-ball variation in C_D has evolved over the years, the focus of the present article. We start with a simple discussion of drag and what it depends on in Section II. Next, in Section III, we discuss several caveats related to the method used to determine C_D values from publicly available pitch-tracking data. Then in Section IV, we get to the heart of the analysis before getting to the principal results in Section V. A summary is given at the end.

II. What is the Drag Coefficient?

When a baseball travels through the air, it collides with air molecules, in effect pushing them out of the way. With each collision, the ball loses a tiny bit of speed, though not nearly enough to result in any measurable difference to the speed of ball. But there are many such collisions, with the net effect being that the baseball slows down significantly. For example, a pitched baseball loses about 9-10% of its speed over the roughly 55-foot distance between release and home plate, so that a ball released at, say, 95 mph is only moving at 86 mph as it crosses home plate. The effect on a fly ball is even greater, since the path length is longer and the ball experiences many more collisions with air molecules, resulting in a huge loss of distance. In fact, a typical 400-foot fly ball in the presence of air would travel over 700 foot in a vacuum if otherwise hit identically. That’s a huge effect. The larger the drag force, the more the ball slows down and the less it carries. Conversely, the smaller the drag force, the more it carries. Read the rest of this entry »

Wednesday evening, Beau Taylor hurt his hand. That is, of course, an occupational hazard of catching; pretty much everything a catcher does hurts their hands. Johnny Bench might be able to hold seven hamburgers in his hand, but have you seen that paw? Yikes!

In any case, Taylor didn’t hurt his hand in any of the more normal ways that catchers do. He didn’t jam it into the ground trying to smother a ball in the dirt, or take a foul tip ricochet off the base of his palm. No, he caught Edwin Encarnación’s bat with the tip of his glove, and though he tried to play it off, this has to have stung:

That will smart for a few days, and the situation was a tough one as well. It’s painful (see what I did there?) to advance a runner to third with only one out, particularly in a one run game in the ninth inning. The difference between needing one and two runs to tie is a big deal; it roughly halves your chances of a comeback. That isn’t to say that Taylor’s catcher’s interference cost Cleveland the game — they didn’t score in the bottom of the frame, so it hardly mattered. But it was a bit of foreshadowing of what was to come. Read the rest of this entry »

The downtime produced by shelter-in-place orders and other restrictions during the coronavirus pandemic has inspired many people to take up new hobbies or polish previously dormant skills. The Jaffe-Span household, for example, has created a windowsill garden with herbs and vegetables, and every person on social media can name a friend or five who has tracked their recent forays into breadmaking. Ji-Man Choi apparently used his time to rediscover the advantages of switch-hitting. On Sunday, in the first major league game in which he batted right-handed, the Rays’ 29-year-old first baseman clubbed a home run off Blue Jays lefty Anthony Kay.

It wasn’t a cheapie, either. Choi hit a 429-foot shot that came off the bat at 109.9 mph — the second hardest-hit homer of his five-season career:

Ji-Man Choi hadn’t ever had a hit as a righty

Ji-Man Choi now has a home run as a righty pic.twitter.com/zo6YSsoWZX

— Tampa Bay Rays (@RaysBaseball) July 26, 2020

The South Korea native, who began his stateside professional career in the Mariners’ organization in 2010, and who does throw right-handed despite regularly batting left-handed, isn’t a complete newcomer to switch-hitting. In 2015, after breaking his right fibula during spring training, he spent time learning to switch-hit under the tutelage of Mariners Triple-A hitting coach Howard Johnson, who spent 14 seasons switch-hitting in the majors, primarily with the Mets and Tigers. Upon returning to action in August, first with the team’s Arizona League affiliate and then with the Triple-A Tacoma Rainiers, Choi went 6-for-14 with a double and a walk while batting righty against left-handed pitchers, and 0-for-2 with two walks while batting righty against righties.

“I did it, and it worked well, so I kept doing it” Choi told MLB.com’s Alden Gonzalez (through an interpreter) the following spring. Gonzalez noted at the time that Choi’s leg kick was more pronounced from the right side of the plate. “But I don’t worry about the form,” Choi said, “I just concentrate on hitting the ball. See the ball, hit the ball.”

That conversation took place in the context of Choi having joined the Angels via the Rule 5 draft. Less than three weeks later, however, the team asked him to abandon switch-hitting, with manager Mike Scioscia saying that the Angels felt Choi’s left-handed swing was better, and that they planned to use him more in that capacity. Read the rest of this entry »

Monday night, Michael Wacha made a cathartic first start with the Mets. Over five solid innings, he struck out four while allowing only one run on a Mitch Moreland solo shot. He walked away with the win, his first in more than a year, and gave Mets fans hope that they might cheat the injury gods and assemble an acceptable rotation. But wait! Michael Wacha was last seen being terrible. It’s time to do some digging. The game is afoot!

We start this investigation, like so many others of sudden pitching competence, with the fastball. But alas, there’s nothing to be gleaned from it. Wacha averaged 94.3 mph on the pitch, a hair higher than last year’s season-long average but only a hair higher than last July’s mark. Allowing for the fact that the switch to Hawkeye might come with some calibration errors, we can rule out a newly lively fastball accounting for the fact that the Red Sox looked flummoxed.

Or can we? Why not spiral deeper, hunt further for fastball clues? His spin rate is up by nearly 150 rpm. Mayhap that’s the culprit. Mayhap indeed — but in my opinion, it’s not likely. Spin is one of the things to be most skeptical about in the new system. Perhaps skeptical is the wrong word; maybe we should be skeptical of the old measurements. The Hawkeye system measures spin directly with high-speed cameras, while the old radar-based system imputed spin from other factors. The point is, spin is going to be a tricky thing to tackle for a good while. Read the rest of this entry »

Andy McKay oversees one of the best farm systems in the game. Seattle’s Director of Player Development does so with a sports-psychology background — McKay has an MBA in Organizational Behavior Studies — as well as a deep appreciation for data and technology. The former college coach is anything but old school when it comes to developing young talent. Case in point: Mariners prospects have their regularly-revisited player plans put together not by coaches, but by analysts.

In Part One of a wide-ranging interview, McKay addresses several of his philosophies, as well as how the Mariners are approaching development without a minor league season.

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David Laurila: We’re talking on July 26, 2020. What is the state of the Mariners farm system right now?

Andy McKay: “We’re really excited about where we’re at, both in terms of our department — the people we’re employing, and the process we’ve created — and the players we have in our system. Those things are moving along at a really good clip. We’re continuing to move the needle forward, even through COVID-19.”

Laurila: How exactly are you moving forward with no minor league season?

McKay: “We made the decision to turn our taxi squad into a very heavy prospect-based camp. If you look at who is down in Tacoma right now… not to mention we had, I think, four players make their major league debuts yesterday. We’re the youngest team in the big leagues. So we have the 10-week program going on, like all the other clubs, and then we’ve got things going on individually, all over the country with our players. Read the rest of this entry »

Starting the season after a long layoff and an abbreviated training camp was bound to put players in different positions of readiness in the season’s early going. When a season starts in late March or early April, teams enjoy a full spring training but weather can have an effect on hitters. Better weather means better offensive production, so it seemed possible that a late-July start might help hitters skip some of the early-season struggles we typically see; the universal designated hitter also seemed likely to help move things along. So far, it has been a bit of a mixed bag.

Through yesterday’s action, teams are scoring 4.5 runs per game, which is down from last year’s 4.8 full-season mark despite the addition of the designated hitter in the National League. Of course, the first week of the 2019 season saw teams score an average of 4.3 runs per game, so there are more runs than the beginning of last season. Runs alone probably aren’t going to tell us if pitchers have a bigger advantage than they normally do, though, particularly when changes to the ball over the last few seasons have had a pretty dramatic effect on scoring. To get a sense of the last few seasons, here are some end-of-season numbers since 2017 (excluding pitchers hitting), along with the start of this season:

Home runs are certainly down from last season, but compared to the last three seasons, the dip isn’t huge. We have seen an increase in the rate of infield fly balls, walks, and strikeouts. The power numbers are down some, but the big drop from previous seasons’ numbers concerns BABIP. The increase in walks isn’t enough to offset the greater number of strikeouts, the lack of power resulting in weaker contact, and considerably worse overall offensive numbers. Before we compare these numbers to typical early-season numbers, let’s add in some plate discipline stats as well:

Read the rest of this entry »

I’m biased, but I think summer in Vancouver can be one of the most beautiful seasons anywhere in the world. The rainforest, having spent the autumn, winter, and spring growing lush under the cover of clouds and rain, shines rich green under the sun, illuminated by the light coming off the ocean. It’s hot, but not overwhelmingly so. On some days, you can look out over the water and see the spout of a humpback whale or the dark, swift-moving fins of a transient orca pod. And at sunset, the bright place where the sky and the ocean meet seem to go on forever.

In the summer of 2017, fires engulfed the Pacific Northwest. There was record heat; record time passed between rainfalls. I spent that summer working in a basement shop, bitter and sad, and when I emerged from the top of the staircase at the end of every day, I would often see a sky choked thick with ash and smoke, the sun swollen and red. Everything that was normally so vibrant was cast over with a dull haze. It was sometimes difficult to breathe. I thought, at the time, that it seemed apocalyptic: the reality of climate change clearly visible above me, around me, hanging in the air itself.

That was the summer Nate Pearson came to town.

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The Vancouver Canadians are the Blue Jays’ short-season affiliate, playing in the Northwest League. Baseball has a long, diverse history in Vancouver, though the city isn’t exactly baseball-crazy. Back when the Canadians were a Triple-A franchise, affiliated most recently with the A’s, there were some pretty lean years in terms of attendance and interest. But a renovation of their ballpark, the 68-year-old Nat Bailey Stadium, and affiliation with the recently-successful Blue Jays has made the franchise one of the healthiest and most well-attended in the minor leagues. The banners around the stadium show some of the Canadians alumni who are currently successful major leaguers — Kevin Pillar, Marcus Stroman, and Noah Syndergaard, to name a few.

They show, too, the legends who visited and played in Vancouver in days long gone: Babe Ruth and Lou Gehrig, who came north on barnstorming trips. Though thoroughly renovated for the demands of a 21st-century baseball team, the Nat is deliberate in making you feel its history. A little museum is tucked into the concourse under the grandstand; the tall wooden scoreboard is a replica of the original, salvaged from the remains of Sick’s Stadium in Seattle. Read the rest of this entry »

Yesterday, the Cardinals got some bad news. Miles Mikolas, the team’s second-best pitcher and a valuable source of bulk innings, suffered a setback in dealing with the arm injury that had bothered him all year. He’ll need surgery to repair his flexor tendon, which will keep him out for all of 2020.

After a scintillating 2018 (2.83 ERA, 3.28 FIP, and a sixth-place finish in Cy Young voting), Mikolas came back to earth slightly in 2019. Even then, his pinpoint control and ability to coax grounders out of opposing batters gave him an excellent floor. While a 4.16 ERA might not sound impressive, it was better than league average in this homer-crazed era, and 184 innings of average pitching is hugely valuable.

The Cardinals came into this season with a competition for starting spots, but Mikolas wasn’t one of the competitors. He and Jack Flaherty would provide the guaranteed quality atop the rotation, while Adam Wainwright, Dakota Hudson, Carlos Martínez, Daniel Ponce de Leon, and Kwang Hyun Kim battled it out for the remaining three slots.

If there’s good news in Mikolas’s injury, it’s that deep bench of starting options. They’re all worse than Mikolas — all worse by a decent margin — but all five look to be quality major league options, which softens the blow. Ponce de Leon, who will take the hill today, made spot starts in 2018 and 2019 with solid results. We project him to be roughly 0.25 runs of ERA worse than Mikolas, which is hardly an unbridgeable gulf.

The real trouble begins if another Cardinals starter goes down. Kim is still an option, but he currently serves as the team’s closer, which is still a pretty wild sentence to write. The bullpen is already a little short-handed, though that should change as Giovanny Gallegos settles in and Alex Reyes and Génesis Cabrera return to the team. At the moment, however, Kim probably can’t stop closing, which leaves St. Louis in a bind. Read the rest of this entry »

In the wake of an outbreak of the coronavirus that has infected 15 Marlins players and two coaches thus far — including four new positive tests reported on Tuesday morning — Major League Baseball showed signs of grasping the gravity of the crisis by backtracking on its previous plan for the team to resume play on Wednesday in Baltimore. Instead, the team’s next two series have been postponed; they won’t play again until at least Tuesday, August 4. The Phillies, whom they faced this past weekend, will be kept out of action until Saturday, August 1 (initially, the plan was for Friday). The postponements affect the Orioles, Yankees, and Nationals, and MLB is in the process of reconfiguring its schedule to absorb the impact of the weekend’s events.

Said MLB in a statement, “Given the current circumstances, MLB believes that it is most prudent to allow the Marlins time to focus on providing care for their players and planning their baseball operations for a resumption early next week.”

The Marlins were initially scheduled to play the Orioles in Miami on Monday and Tuesday, and then in Baltimore on Wednesday and Thursday. In an interview with MLB Network’s Tom Verducci on Monday — by which point the team had at least 13 known infections among players and staff — commissioner Rob Manfred suggested that the Marlins could resume play on Wednesday and Thursday in Baltimore “if the testing results are acceptable.” Even absent Tuesday’s positives, how a double-digit total of infected personnel could be deemed “acceptable” in this context is unclear, but in any case Manfred and the league have seen the light, so now that two-game series has been postponed, as has the Marlins’ three-game set against the Nationals in Miami from July 31-August 2, after which they have a scheduled off day. Per The Athletic’s Ken Rosenthal, the “vast majority” of Nationals players voted against going to Miami for the series, and while it wasn’t their call to make, it’s noteworthy that the players publicly offered some pushback regarding the league’s plans.

Read the rest of this entry »