MLB 2023 rules changes were the most dramatic alterations in decades, drastically speeding up the game.

The 2026 MLB season is the first to allow players to challenge umpires' calls on balls and strikes.

Visualize how changes to lineups, driven by modern analytics, could have changed one of MLB's most iconic moments.

Major League Baseball, explained

Major League Baseball is America’s oldest professional sports league. Alongside triumphs, the league has faced scandals, including drug abuse and steroid use, shaping its path over the decades. Today, MLB embraces new rules, international talent, and a growing connection to legalized sports betting.

Fourteen ways to make baseball cool again

Baseball, while commonly known as America's pastime, gets a bit of a bad rap for being long, slow, and boring. Here are fourteen fun ideas to make the sport more interesting to combat dwindling attendance.

Before 1920, during the Deadball Era, a single baseball was used throughout a Major League game, leading to a notoriously dirty style of play.

Inside MLB's robo-umping experiment

Human umpires call roughly 94% of pitches right overall, but performance reduces on borderline pitches in high-leverage moments, the calls that shape game outcomes most. A professor and historian analyze early experiments with the full "robot ump" system that helped shape MLB's decision to implement a compromise "challenge" system.

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.

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.

How Shohei Ohtani made baseball fun again

To rise to the level of Major League Baseball in recent decades, a player needs to become a specialist in at least one of the sport's many skills: hitting, pitching, throwing, running, fielding. For decades, this specialization has made a so-called...

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.

Statcast, MLB's sophisticated real-time data analytics system, runs machine learning models in the 23-second gap between every pitch.

​​Some allege the NFL has shifted gameplay toward fantasy

Recent rule changes in the league have increased passing and point-scoring, which critics argue is motivated by a desire to appeal to fantasy-loving viewers who might be frustrated by slower, lower-scoring games.

100 moments that shaped baseball history

Published in 2018 by baseball historian Jacob Kornhauser, this list examines the defining moments throughout more than a century of play on the field, from Pittsburgh Pirates pitcher Dock Ellis purportedly throwing a no-hitter while on acid to Jackie Robinson breaking the color barrier.

Explore the data behind every Major League Baseball player's success rate with ABS, its new tech-assisted challenge system.

The MLB consist of 30 teams

The league is home to the National and American leagues, which include 780 active players. The MLB season is the longest in professional sports, with 162 games played during the regular season, typically from April through September, ending with the World Series championship in October.

In 1975, a Major League Baseball clause that kept players legally tied to their teams after retirement was dismantled, creating the modern concept of free agency.

The first MLB All-Star Game was designed by a sports journalist who believed the spectacle would boost baseball's reputation during the Great Depression.

Every baseball used by the MLB only lasts about 7 pitches before it's discarded.

The biggest controversies of the NFL

Some of the biggest controversies in NFL history didn’t just spark debate—they changed the game. From Spygate and Deflategate to concussion research and the league's ambivalent stance on it, these moments led to new rules, safety measures, and major policy shifts. Explore how each scandal shaped the league and its future.

A sophisticated data analysis found that stadiums with roofs or in cities that regularly have sunny skies are the easiest for outfielders to play in.

Some say baseball's drug problem goes back to the late 1800s

At age 32, pitcher James “Pud” Galvin was feeling tired and decided to take "the Brown-Séquard elixir," which contained a testicular fluid from dogs and guinea pigs, believed to invigorate tired bodies. It might've worked: Galvin pitched a two-hit shutout the next day.

How baseball shaped Black America during Reconstruction

A cornerstone of the budding Black culture following the Civil War was baseball, with several clubs springing up in Black neighborhoods and leaders like Frederick Douglass cheering on the players, including his son, who played for a team in Washington. This detailed history of the early Black leagues unpacks how the game enhanced the upwardly mobile community—and why that fact led to the segregation of what would become Major League Baseball.

A 1930s card game birthed modern fantasy sports

"National Pastime" used the statistics of real Major League Baseball players to determine a winner, creating the template for the modern fantasy sports model.

Sabermetrics, the empirical analysis of baseball statistics made famous by 'Moneyball,' redefined how people evaluate baseball players, overturning a century of assumptions about which metrics matter most.

Minor leaguers once unionized for better pay, housing, and medical care

For decades, Minor League baseball players endured overcrowded housing, indifferent medical care, and all-night bus rides for a chance to make it to “The Show.” And they did it for as little as $4,800 a year.

PIckleball is the fastest-growing participation sport in America

The outdoor game experienced a surge in popularity during the 2020 pandemic because it could be set up in driveways, be played by all ages, and allowed for safe social interactions. That social aspect has helped pickleball’s popularity continue to rise post-pandemic. A March 2023 APP report showed 48.3 million American adults played the sport in the last 12 months.

The evolution of the baseball bat

Torpedo bats may be the latest, most powerful kind of baseball bat, but the instrument's history is long. This Smithsonian resource traces the bat's evolution from handmade objects forged by the players to mass-produced marvels of physics designed by companies like Louisville Slugger. Along the way, you'll see some interesting takes on the form, including bats referred to as "mushrooms" and "bananas."

The MLB's reserve clause gave owners rights to players after their contracts expired

The clause was added to contracts in 1879, allowing owners to hang on to players after the expiration of their contracts, sometimes in perpetuity.

The 2011 film 'Moneyball' shifted ideas about sports and statistics

Based on the Michael Lewis book of the same name, the film starring Brad Pitt depicts the attempts of the 2002 Oakland A's to leverage data analysis to overcome their low-budget woes ($41M) and compete with big-budget teams like the New York Yankees ($125M). Other sports and leagues, including the NBA and NFL, would adopt a similar logic: find what the market undervalues and exploit it.

Integration of Latino players in MLB

The Senators’ spectacular losing record obscures one of the most important stories in baseball history: the club’s role in integrating Latino players into the major leagues

Explaining the rise in adult sports leagues

Community sports leagues shifted from publicly supported entities to privatized ones in the 1990s, as tech advances streamlined registration processes. Millennial interest drove significant growth in social sports leagues for adults, growing much faster than other kinds of sports. A few industry leaders have benefited from this shift.

MLB teams can travel with roughly 12,000 pounds of gear and luggage.

NFL kickers are kicking the ball farther than ever before

A combination of training, technique, and new rules regarding equipment has led to a sharp improvement in kicking since 2020. Certain players are now allowed to keep footballs with them throughout the practice week and play with a ball of their choosing during games.

Measuring which nation has the most baseball fans

It's known as America's pastime, but just how devoted are Americans to baseball? FiveThirtyEight outlines several metrics indicating Puerto Rico may have the most devoted fanbase. See how they used an adjusted metric to rank the world's biggest...

A visual guide to identifying baseball's pitches, from common pitches like 'fastball' and the 'change up' to specialty types, like 'cutter' and 'slurve.'

Explore some of the best baseball books, including Michael Lewis' influential 'Moneyball' and Bob Uecker's autobiography 'Catcher in the Wry.'

Pickleball's popularity has created a power struggle

The sport's sudden rise has led to a tumultuous landscape with battles over governance, court space, and player rights. This Sports Illustrated deep dive examines the competing billionaires vying for control, the conflicts over court usage and noise disputes, and how a second proposed Hall of Fame is dividing the sport.

Sports leagues have attempted to prevent athletes from betting

As pro and collegiate sports embrace betting (and the revenue that comes with it), each league works diligently to ensure the integrity of the games by hiring private firms to analyze irregular bets. These companies have flagged bets that led to the firing of Alabama’s baseball coach, the suspension of multiple athletes at Iowa and Iowa State, and, most recently, a lifetime ban on former Toronto Raptors forward Jontay Porter by the NBA in April 2024.

Fantasy sports' roots go back to an 1860s parlor game that simulated real-world baseball.

The 100 most significant sports moments between 2000 and 2025

This list ranks the 100 most significant sports moments of the first 25 years of the 21st century. The editors compiled the collection based on a list of factors, including the "collective joy" factor, whether it made you curse in disbelief, and how much it transcended the sport and entered the broader culture. The top moment: The improbable "helmet catch" during the Super Bowl in 2008.

A new logo helped the NBA stay relevant in the '70s

In 1967, the American Basketball Association was formed, featuring a flashier style of offense. The competition caused player salaries to rise in both leagues. After watching Major League Baseball unveil its new logo, the NBA decided to use the same designer to create an iconic logo for the league. It debuted in 1971 and reignited basketball fans' interest.

How pitcher Pedro Martinez helped reverse the curse of the Red Sox

The team had not won a World Series for nearly 100 years—while their rivals, the Yankees, had won 26. The Dominican pitcher joined the club in 1997 and helped lead the team to reverse the curse.

The story behind one infamous World Series moment

“The Bartman Incident” during Game 6 of the 2003 NLCS forever changed the life of Cubs fan Steve Bartman, who quickly descended into anonymity. This 2005 ESPN story attempts to find answers behind the notorious Bartman.

Sidearm pitchers—who throw the ball at an odd angle, sometimes very close to the ground—are a rarity in modern baseball, which often makes them more difficult for batters to hit.

Every MLB baseball needs to be rubbed with a special kind of mud, provided by one New Jersey family.

Watch some of the best moments from All-Star Game history, including Cal Ripken's final All-Star at bat, an Ichiro inside-the-park home run, and more.

Jackie Robinson's iconic 42 is the only number that's been retired leaguewide, meaning no current players can wear it except in his honor.

The rising cost of taking a family to the ballgame

While inflation affects the price of all goods and services across an economy, some hit harder for consumers than others. Taking data from the average cost of tickets all the way down to the number of hot dogs a family would buy, the average pricetag for a family of four to attend a baseball game is now just over $200–making America’s pastime cost-prohibitive for many families.

Tim Donaghy and the NBA game fixing scandal

A two-year investigation by ESPN details how former NBA referee Tim Donaghy conspired to fix games, who he was working with, and where the money was going. In a lengthy statement, the NBA denied much of the new claims in the article, saying the data ESPN used was not strong and they were unable to replicate it. Donaghy was given a lifetime ban and served nearly all of his 15-month sentence.

The 1919 Chicago White Sox, later known as the 'Black Sox,' were banned from baseball for fixing that year's World Series despite being acquitted in court.