Major League Baseball, explained

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 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.

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 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.

The NBA, explained

From humble beginnings in 1891, basketball transformed into the global juggernaut we know today. The NBA, established in 1949 and later revitalized by Commissioner David Stern in the 1980s, became a model for sports branding, player marketing, and international expansion.

In 1975, a Major League Baseball clause that kept players legally tied to their teams after retirement was dismantled

Players fought the "reserve clause" for years, citing the Sherman Antitrust Act of 1890, but to no avail—in fact, the Supreme Court ruled professional baseball was neither interstate nor commerce in 1922. Players effectively unionized in 1966, and by 1975, an arbitration panel ruling led to the dismantling of the reserve clause, which had been the only antitrust exemption in professional sports.

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.

NFL explained

The NFL is the premier professional American football league, founded in 1920 in Canton, Ohio. It consists of 32 teams playing an 18-week regular season from September to January, culminating in the Super Bowl championship in February. The NFL has grown into the world's most valuable sports league, generating nearly $20B in revenue in 2023, and with teams valued at $163B combined. Learn its history here.

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.

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.

The top 100 players in baseball history

More than 20,000 players have played in Major League Baseball since the 1870s, many passing in and out of the memory of even die-hard fans. While necessarily subjective, these rankings based on votes from baseball writers ranks those whose greatness left a lasting impression. From Barry Larkin (No. 100) to Babe Ruth (No. 1), explore the top 100 baseball players over more than a century.

A Bay Area lab was supplying MLB players with steroids

The Bay Area Laboratory Co-operative, also known as BALCO, began as a modest vitamin shop, but by the 1990s it was at the center of a doping scheme that rocked Major League Baseball and other professional sports.

A timeline of sports-betting scandals

This timeline examines memorable moments from three decades of sports-betting history. It breaks down key political moments, as well as some historical moments such as when the internet pushed underground bookmaking online. There are also multiple descriptions of betting scandals from 1989 on.

A guide to the best baseball books

If you're really all-in on the game, then you might want to dig into one of these classics, like Michael Lewis' "Moneyball," about the analytics that changed the sport, or Bob Uecker's autobiography, "Catcher in the Wry."

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...

Fenway Park is the oldest professional baseball stadium in use

The legendary park was built in 1912 and is considered hallowed ground for baseball fans, along with iconic venues like Yankee Stadium in the Bronx and Wrigley Field in Chicago.

The long history of alcohol and sports

Spectators have long enjoyed alcohol at sporting events, dating back at least to ancient Rome. This article unpacks how companies leveraged this history to make beer a central part of sporting events and masculine culture.

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.

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.

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.

Leagues like the Premier League differ from the World Cup

The Premier League and other similar club leagues are professional organizations like the NFL or the NBA, where owners purchase player contracts. World Cup teams, on the other hand, are organized by citizenship.

A look into Major League Soccer supporter clubs

Supporter clubs are legion in Europe and South America, where soccer is an obsession. The sport is not nearly as popular in the United States, but that does seem to be changing, due in no small part to the slow success of Major League Soccer and its dedicated fan bases. This brief documentary examines a handful of American supporter clubs who sing songs, cheer wildly, and commit themselves and their families to their hometown clubs.

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."

NHL Commissioner Gary Bettman rejects ties between CTE and playing hockey

After multiple shocking deaths and several explosive studies, the NFL chose to embrace the league’s role in brain injuries related to concussions. But despite having concussion numbers similar to football and several studies on hockey players, the NHL has chosen to dispute the link.

How is the climate like baseball?

A two-minute video taking a lighthearted look at an unexpected analogy, explaining why some people call carbon dioxide (and the other greenhouse gases) the steroids of the climate system.

The Triple Crown, explained

Only 13 horses have ever won the Triple Crown—one of the most elusive titles in American sports. This explainer breaks down how the series works, why it's so difficult to win, and the legendary horses that defied the odds across the Kentucky Derby, Preakness Stakes, and Belmont Stakes.

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

Exploring the Larry Bird punch that almost changed March Madness

The US first hosted the World Cup in 1994, a tournament that lives in soccer infamy for its poor planning and the murder of Colombian player Andres Escobar, who'd accidentally scored on his own net.

The power and influence of the American presidency have expanded significantly over time—far beyond what the founders envisioned.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

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

At the beginning of the 20th century, a group of young men ate standard American food—replete with food additives like borax and formaldehyde—as part of government research to better understand food safety.

Memecoins are a type of cryptocurrency—a form of digital currency with a wide variety of uses—created around popular 'memes,' or viral internet jokes.

While the first exchange-traded fund (a 'basket' of different assets that can be bought and sold on a stock exchange) in the US only launched in 1993, the global ETF market has grown to more than $10T in the short time since.

Learn how to read a prospectus, the juicy document that any company must file with the SEC before going public.

See how fireworks are made and learn how metals like magnesium and copper are responsible for different colors.

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

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

Some Pokémon have been named after real and fictional organisms, while some real-world species have been named after Pokémon, such as Chilicola charizard and Binburrum zapdos.

The word 'jazz' evolved from 'jasm,' 19th-century American slang for 'energy'

Louisiana's 'Cancer Alley' is infamous for having some of the highest industrial pollution, toxic air emissions, and cancer risks in the US.

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

'Saturday Night Fever,' the 1977 film that introduced disco to the mainstream, was based on a fabricated magazine story.

Fast-casual restaurant Chili's is experiencing a resurgence, with its parent company recently reporting a nearly 32% increase in sales, thanks to passionate Gen Z fans on TikTok.

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.

Most of the observable universe's volume consists of voids and supervoids—enormous regions of space with little to no galaxies, stars, or light.

The Brothers Grimm were lawyers before they were storytellers, but became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.