Baseball

What is baseball?

Baseball is a nine-a-side bat-and-ball game played over nine innings — pitchers against hitters, runs scored around four bases — the historic American team sport and the defining sport of the Caribbean basin and East Asia. Its professional summit is Major League Baseball; its international game runs under the WBSC.^[1] [2]

How does baseball work?

There is no clock: each team bats until three outs, nine innings decide it, and a 162-game MLB season rewards depth like no other sport. The professional pyramid is deep and formalized — the Minor Leagues' four classes feed MLB, winter leagues run across Latin America, and Japan's NPB and Korea's KBO are major leagues in their own right. Player movement is documented at every step: contracts, options, waivers and international signings.^[1] [2]

Formats & levels in baseball

What are baseball's origins?

Evolved from English bat-and-ball games and codified in 1840s New York (the Knickerbocker rules), professional by 1869 and organized into the National League in 1876. The sport spread with American trade and military presence — to Cuba and the Caribbean in the 1860s-70s, to Japan in the 1870s — which is why its greatest talent pools today ring the Caribbean and the Pacific.^[1] [3]

Where is baseball popular?

The United States and Japan are its biggest markets, but per capita nowhere loves baseball like the Caribbean basin: the Dominican Republic supplies more MLB players than any country outside the U.S., with Venezuela close behind — over a quarter of major leaguers are born abroad, led by those two nations plus Cuba, Puerto Rico and Mexico. Venezuela's 2026 World Baseball Classic title, won in Miami, was a national event.^[2] [4]

Who governs baseball?

The WBSC governs the international game — world rankings, World Cups, Olympic baseball — through 191 national federations (183 full and 8 provisional members, by its own count),^[22] USA Baseball among them. MLB governs the professional game in North America and owns World Baseball Classic, Inc. (WBCI), which MLB.com describes as jointly operating the Classic with the MLB Players Association; MLB.com adds that the Classic “is sanctioned by the World Baseball Softball Confederation (WBSC) as the sport's official National Team World Championship”;^[21] NPB, KBO and the winter leagues govern theirs, with the Caribbean confederation uniting the winter champions each February.^[2] [5]

What are the most important competitions in baseball?

• The World Series — MLB's championship, the sport's biggest club stage since 1903.^[2]
• The World Baseball Classic — the national-team championship with major leaguers, every three-to-four years.^[4]
• The Olympic tournament — returning at LA28, with softball beside it.^[5]
• The Caribbean Series — the winter-league champions of Latin America, each February since 1949.^[6]
• Japan's NPB and the Japan Series, Korea's KBO, and the WBSC Premier12 between Classics.^[5]
• The College World Series — Omaha's June institution.^[7]

How is baseball awarded?

• MVP, Cy Young and Rookie of the Year awards — the BBWAA's honors — plus All-Star selections, Gold Gloves and Silver Sluggers.^[2]
• National-team selection for the Classic, Olympics and WBSC events, with the WBSC World Rankings the official ladder of nations.^[5]
• The MLB Draft and international signings — signing bonuses and draft position are public, graded credentials.^[2]
• Winter-league honors — LIDOM and LVBP titles, Caribbean Series MVPs — the credentials of the Latin American game.^[6]
• Statistical records — every professional career documented on Baseball Reference, minors included.^[8]

What is the college role in baseball?

College baseball is a genuine second pathway beside the high-school draft and international signings: the College World Series has filled Omaha every June since 1950, the American Baseball Coaches Association names All-Americans, and NJCAA and NAIA programs — plus the wooden-bat summer leagues like the Cape Cod League — extend the ladder. Most American draftees now arrive through college programs.^[7]

Which media cover baseball?

Baseball's press is the oldest in American sport — ESPN, The Athletic and MLB's own network lead coverage, with Baseball America the authority on prospects — while Baseball Reference is the sport's statistical record and the WBSC Rankings its official national-team database.^[2] [8]

→ Full list: Top media in baseball

Who has won the most in baseball?

World Series titles through 2025 (the Dodgers' back-to-back); player counts follow the Baseball-Reference convention. World Baseball Classic through the 2026 edition (Venezuela 3–2 United States); the Caribbean Series through 2026 (Charros de Jalisco, Mexico's tenth). The WBSC site is not machine-readable, so Classic results are from MLB's own reports.

Most World Series titles — franchises

World Baseball Classic titles by country

Most World Series titles as a player

Caribbean Series titles by country

Ties are broken by gold, then silver; a tie at tenth place is shown in full when four or fewer share it. Historic teams are kept as separate rows exactly as the source counts them. Verified September 2026.^{[9] [10] [11] [12]}

Which brands supply and sponsor baseball?

WBSC approves the bat by published list and settles the ball by contract. The Official Rules of 2025-2026 Baseball specify the ball at Rule 3.1 by construction — yarn wound on a cork or rubber core under two stitched strips of horsehide or cowhide — and the bat at Rule 3.2 as wood, or other material complying with WBSC specifications. Rule 3.2.2 goes further: “The players can only use one-piece wooden bats that are included in the Official WBSC approved wood bat list published in the current year”, and Rule 3.2.3 bars composite bats.^[13] That list, the Official Approved Wooden Baseball Bats List for WBSC Competitions, is dated 10 October 2025, is alphabetical by brand, and opens with Adidas, Amazing Baseball, Asics, B45 and Birdman Bats.^[14] No comparable list governs the ball: WBSC instead named SSK “exclusive provider of the official competition ball” for its Premier12 and Baseball World Cups, under an agreement WBSC stated would run through 2025.^[15]

NOCSAE publishes ND022 for batters' helmets, ND024 for catchers' helmets with faceguard and ND027 for baseballs.^[16] It states that “NOCSAE does not certify or approve equipment. Our standards are the basis for certification by Safety Equipment Institute”.^[17]

Uniform supply and sponsorship sit with the leagues. Major League Baseball named Nike “Official Uniform and Footwear Supplier of MLB” under a ten-year agreement from the 2020 season,^[18] and on 23 March 2026 named Zillow “the official real estate and home rentals marketplace partner of MLB” in a multiyear agreement whose end year is not stated.^[19] See sponsorship and athlete marketing rules.

The technology contract is measurement, not timing. MLB's Joint Competition Committee approved the Automated Ball-Strike Challenge System for all spring training, championship season and postseason games from 2026; MLB states that twelve Hawk-Eye cameras around the field track each pitch.^[20]