Inside MLB's robo-umping experiment

The 2026 season will be the first to allow challenges on balls and strikes

The Automated Ball Strike (ABS) technology—first tested in the minor leagues and in MLB's 2025 spring training and All-Star Game—defines the strike zone rather than relying on individual umpires' interpretations of it. Rather than allowing ABS to determine every ball or strike, though, each team will now have a limited number of in-game challenges to umpires' calls, which will be settled by ABS.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

In 2023, MLB changed its rules to speed up the game

The league made its most dramatic rules changes in decades by banning the shift, enforcing a pitch clock, limiting pickoff plays, using bigger bases, and adding a baserunner in extra innings. The changes worked, generating renewed interest in the sport.

Statcast runs machine learning models in the 23-second gap between every pitch

The same Hawk-Eye cameras that track spin rate, exit velocity, and sprint speed also feed proprietary team models that update in near-real time. Some organizations have built streaming pipelines to surface insights mid-at-bat before the next pitch arrives.

A guide to sabermetrics, the empirical analysis of baseball statistics

The science of baseball overturned a century of assumptions about which metrics matter most. The approach originated key categories like WAR (wins above replacement, which tries to summarize a player's total contribution by estimating how many more wins this player generated compared to a replacement-level player) and wOBA (or weight on-base average, which measures not only hits but also walks and their outcomes in the score).

A history of the rare, chaotic moments when MLB batters charge the pitcher on the mound

They typically occur when a pitcher has slung a pitch a little too close to the batter—though the exact causes vary, from quick tempers to longstanding grudges. No definitive account of these infrequent but highly visible incidents has existed, so sportswriter Jon Bois compiled data on 264 such moments between 1950 and 2025. The resulting 23-minute video explores the rich narratives leading to these charged events.

Visualizing how changes to lineups would impact historical baseball games

This visual essay maps how data-informed lineup construction has revolutionized baseball. Amid the embrace of analytics, the game's best overall hitters were moved from the third spot to second, power bats were shifted out of the "cleanup" role, and speedsters—typically the leadoff batters—were pushed to the bottom half of the nine-player lineup. Joe Carter, the hero of the '93 World Series, likely never hits his iconic walk-off from the cleanup spot in a modern lineup.

Instant replay was unofficially introduced in baseball in 1999

During a game between the St. Louis Cardinals and the Florida Marlins, home plate umpire Frank Pulli used video replay to determine whether a hit was a home run or a double. The action was controversial and Pulli claimed he didn't want it to become the norm for the league, though it did: In 2008, video replay was officially used to judge home run calls and has since become a regular part of the game.

MLB pitchers were charged with benefiting from sports betting

In November 2025, two pitchers for the Cleveland Guardians were charged with coordinating with sports bettors to enrich themselves and others. In many instances, they shared the kinds of pitches they would throw at specific points in the game. Bettors then placed money on those actions.

Every MLB baseball needs to be rubbed with mud

When baseballs are done being hand-sewn and shipped to an MLB ballpark, they don't go straight to the field. Every ball that is put in play–an average of 100 per game–has to be rubbed with mud to give the ball a better grip. This video introduces the only family licensed to sell mud to MLB and shows what's special about this particular mud.

An eephus pitch catches batters by surprise

The specialty pitch—rarely used by starters—is unexpectedly slow and thrown with an abnormally high arc, often catching batters off-guard. Below is one famous example from 1981: Yankees pitcher Dave LaRoche striking out the Brewers' Gorman Thomas with an eephus that fans called the "La Lob."

Ranking every baseball stadium outfield by how hard it is to play

Park factors have long adjusted for how a ballpark helps or hurts hitters and pitchers, but rarely fielders. MLB's Statcast looked at five years of Outs Above Average data to shed light on the gap. It found that stadiums with roofs or in cities that regularly have sunny skies dominate the easy end, while those battered by wind or rain, like San Francisco's, are the hardest to play.

"Guessing what the pitcher is going to throw is 80 percent of being a successful hitter. The other 20 percent is just execution."

- Baseball star Hank Aaron (1934-2021)

The gray area that makes PEDs seem like leveling up to hardcore athletes

Doping in sports is broadly condemned as unsafe and unfair. Significant controversies in major sports, including baseball and cycling, have been prompted by the widespread use of performance-enhancing drugs, which are described as clear-cut dangers and abuses of the rules. But to many competitors, the line between a PED and the next smart technique to adopt is unclear. This podcast episode explores that gray reality.

NFL Draft decisions are shaped by brain science, data, and office culture

Carnegie Mellon researchers say Draft-room choices are influenced by the "jackpot effect"—where higher stakes can impair performance—as well as by groupthink, the limits of data, and whether scouts feel safe speaking up.

NBA referee Tim Donaghy was paid roughly $300K to fix games

Donaghy said he struggled with a gambling addiction, causing him to risk so much. In this interview, he explains the story of his scandal, and how the mob led to his eventual arrest.

Smart pricing algorithms can unintentionally work together to raise prices

Researchers have found that, through trial and error, algorithms designed to adjust prices based on market data can learn to mimic price-fixing tactics, even without explicit programming to do so. Over time, they "learn" that it is more profitable to avoid price wars and keep prices high when competitors lower prices.

The history of torturing robots

When machines fail, its easy to get mad and even give them a good kick. But as humanoid robots become more sophisticated, the degree to which people abuse them has shifted, depending on how much emotion the robot expresses. Studies revealed when robots were programmed to cry during distress, participants felt empathy. Learn more about the history of human abuse of robots here.

How March Madness bracketology became a national obsession

An estimated 60 million people fill out March Madness brackets yearly, despite a one in 9.2 quintillion chance of filling it out perfectly. This Smithsonian magazine article explores how UCLA's dominance in the 1960s and '70s made brackets boring and predictable, and how the expansion to 64 teams and putting games on TV played a huge role in popularizing March Madness brackets.

The journalist who let AI speak with his voice

Journalist Evan Ratliff became the object of his own story: He opted to clone his voice, feed it into an AI chatbot, and have it do the talking. What could seem like a fun experiment ended up revealing just how far the capacity of artificial intelligence can go in imitating our identities. Hear the ins and outs of how Ratliff achieved this in this fun and thought-provoking episode.

Exploring the Larry Bird punch that almost changed March Madness

Watch how algorithms can be designed to train themselves and self-improve without human input, to the point where the optimized code is too complex for programmers to understand.

How algorithmic redistricting works

Computational methods are convincing a number of judges that some state district maps are drawn illegally. Here's a simple overview of how it works.

AI scraping for LLM training data has significantly strained Wikipedia's infrastructure

From January 2024 to April 2025, the site's bandwidth increased by 50% as automated bots downloaded terabytes of data for the large language models powering AI tools. The Wikimedia Foundation found that bots accounted for 65% of the highest demand requests (e.g., videos) despite representing just 35% of page views.

Simulations incorporating mixed reality have improved trainee certification rates

Such software provides immersive, risk-free environments where students can manipulate digital re-creations to optimize the training experience without producing waste. One meta-analysis showed that MR in welding training boosted passing rates on certification exams by 41.6% versus traditional training methods.

Advance genetic research by playing these scientific video games

Computers produce so much information that researchers can’t properly analyze all the data produced, and the overload can also lead computers to make mistakes. Researchers are increasingly turning to citizen scientists—members of the public who are willing to volunteer—to help them make sense of data when computers can’t. This article details a few of the ways you can contribute to genetics research by playing video games.

How exchanges like the Chicago Mercantile act as trading referees

Chicago's Mercantile Exchange emphasizes futures contracts on commodities. This podcast episode breaks down how exchanges actually work, make money, and streamline the market.

Robinson is among the league's greatest figures

Robinson won Rookie of the Year and played in the majors for 10 seasons, winning a World Series in 1955. He was inducted into the Hall of Fame in 1962. The Dodgers retired his number, 42, in 1972, and MLB retired it league-wide in 1997.

Explore chaos in this simulation of two double pendulums, where small differences in the release angles produce wildly different outcomes.

A vending machine run with Anthropic's AI went out of business after it was convinced to give away items for free and sell a video game console.

Radioactive elements can introduce software errors because the ionizing radiation they produce can detach electrons from atoms, and computer code relies on the distribution of electrons.

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

A pickleball's loud 'pop' sound can reach 120 decibels, which is equivalent to a hammer hitting a nail

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

In 1939, baseball star Lou Gehrig delivered his inspirational 'Luckiest Man' speech after retiring due to the health condition that now bears his name.

The first robot in literature may have been a 'mechanical man' in 1907's 'Ozma of Oz,' a book in L Frank Baum's 'Wizard of Oz' series.

Apollo astronauts left items in the moon's 'toss zone,' including golf balls, family photos, and bags of human waste, to make room for lunar rocks.

Hear 50 years of iconic hip-hop samples, the genre's foundational looped tracks

Budweiser stores yeast derived from the original 1800s strain in a secret bunker, which only the Head of Yeast Management can access—not even the CEO

After 25 people used virtual reality headsets to practice flying with virtual wings—flapping their arms—their visual cortex responded to the wings almost as if they were real arms, treating them as body parts.

Listen to an in-depth conversation on the links between Parkinson's disease and herbicide exposure and the challenging pace of scientific investigation.

Watch how deep-sea mining equipment collects and processes polymetallic nodules—metal-rich, potato-shaped rocks—from the ocean floor and creates environmentally damaging plumes of sediments.

Indefinite cloning of some endangered species may not sustain their longevity because cloning success rates decrease as genetic mutations accumulate.

See a ranking of the best (and worst) Federal Reserve Chairs since 1914 out of the 16 men and women who have held the office since.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

Power lines are dotted with large, brightly colored balls to improve the visibility of these thin wires to helicopters and small planes and help prevent potential crashes.

A Yale student wrote a profound essay about the consulting industry's influence on elite college students that was published in a book of her writing after she died in a post-graduation car accident.

The Nasdaq's 'Magnificent 7' companies are responsible for roughly 40% of the Nasdaq 100 index's gains, while the remaining 93 companies account for the other 60%.

Bone marrow (soft tissue found inside certain bones) generates roughly 500 billion new blood cells each day

Use this tool to calculate the dollar value of your parental mental load, from meal planning to coordinating after-school care, then see resources that help generate solutions.