A Complete Guide to Major League Baseball Teams, Nicknames, and Mascots

Major League Baseball (MLB) is one of the oldest and most storied sports leagues in the world. Founded in 1903 after the merger of the National League (NL) and the American League (AL), it has grown into a 30-team league with a rich tradition, fierce rivalries, iconic players, and legendary ballparks. Beyond their official names, each team carries unique nicknames and mascots, adding to the culture and color of the game. Let’s explore all 30 MLB teams — their nicknames, mascots, history, and some of their greatest achievements and players.

American League (AL)

AL East

Baltimore Orioles — O’s, Birds | Mascot: The Oriole Bird
The Orioles, based in Baltimore, Maryland, are named after the state bird. Their glory days came in the 1960s and 70s, led by Hall of Famers Brooks Robinson, Frank Robinson, and Jim Palmer. They won three World Series titles (1966, 1970, 1983). Cal Ripken Jr., "The Iron Man," is perhaps their most iconic player, known for his record 2,632 consecutive games played.

Boston Red Sox — Sox, BoSox | Mascots: Wally the Green Monster, Tessie
Founded in 1901, the Red Sox are one of baseball’s most storied franchises. They famously endured an 86-year championship drought (the "Curse of the Bambino") after trading Babe Ruth to the Yankees in 1919, until breaking through in 2004. With legends like Ted Williams, Carl Yastrzemski, David Ortiz, and Pedro Martinez, the Sox have won 9 World Series titles.

New York Yankees — Yanks, Bronx Bombers | Mascot: None officially
The Yankees are the most successful team in MLB history with 27 World Series championships. Founded in 1903, they have fielded countless legends: Babe Ruth, Lou Gehrig, Joe DiMaggio, Mickey Mantle, Derek Jeter, and Mariano Rivera. Known for their pinstripes and storied rivalries, especially with the Red Sox, the Yankees symbolize baseball dominance.

Tampa Bay Rays — Rays | Mascots: Raymond, DJ Kitty
A relatively young franchise (founded in 1998), the Rays have quickly made their mark, reaching multiple postseason appearances and two World Series (2008, 2020). Known for innovative strategies and player development, they’ve produced stars like Evan Longoria, Blake Snell, and Randy Arozarena.

Toronto Blue Jays — Jays | Mascot: Ace, Junior
Canada’s lone MLB team, the Blue Jays were founded in 1977. They captured back-to-back World Series titles in 1992 and 1993, becoming the first non-U.S. team to do so. Players like Roberto Alomar, Joe Carter (who hit the walk-off homer to win the ’93 title), Roy Halladay, and Vladimir Guerrero Jr. have left lasting legacies.

AL Central

Chicago White Sox — Sox, ChiSox, South Siders | Mascot: Southpaw
Founded in 1901, the White Sox have three World Series titles (1906, 1917, 2005). They are perhaps best remembered for the 1919 “Black Sox” scandal but redeemed their legacy with a 2005 championship sweep. Greats include Frank Thomas, Paul Konerko, and Nellie Fox.

Cleveland Guardians — Guards | Mascot: Slider
Formerly the Cleveland Indians, they became the Guardians in 2021. The franchise has two World Series titles (1920, 1948) but has endured a long championship drought since. Legendary players include Bob Feller, Tris Speaker, and Jim Thome. Their mascot, Slider, is a colorful presence at Progressive Field.

Detroit Tigers — Tigs, Motor City Kitties | Mascot: Paws
One of MLB’s oldest franchises (founded in 1901), the Tigers have four World Series championships (1935, 1945, 1968, 1984). Legendary players include Ty Cobb, Al Kaline, and more recently Miguel Cabrera, a two-time MVP and Triple Crown winner.

Kansas City Royals — Royals, Boys in Blue | Mascot: Sluggerrr
The Royals, founded in 1969, won their first World Series in 1985 and a second in 2015 after a remarkable postseason run. Hall of Famer George Brett is the franchise’s most iconic player, while Salvador Pérez became the face of the 2015 champions.

Minnesota Twins — Twins, Twinkies | Mascot: T.C. Bear
Originally the Washington Senators before relocating in 1961, the Twins have three World Series titles (1924 as Senators, 1987, 1991). The 1991 series, won on Kirby Puckett’s heroics, is considered one of the greatest ever. Other greats include Rod Carew and Harmon Killebrew.

AL West

Houston Astros — Stros | Mascot: Orbit
Founded in 1962, the Astros moved from the NL to the AL in 2013. They’ve become a powerhouse in recent years, winning World Series titles in 2017 and 2022 (though the ’17 win was clouded by a sign-stealing scandal). Stars include José Altuve, Justin Verlander, and Craig Biggio.

Los Angeles Angels — Halos | Mascot: Rally Monkey (unofficial)
Founded in 1961, the Angels won their lone World Series in 2002. They’ve been home to legends like Nolan Ryan, Vladimir Guerrero, and Mike Trout, widely considered one of the greatest players of his generation.

Oakland Athletics — A’s | Mascot: Stomper (elephant)
With nine World Series titles (five in Philadelphia, four in Oakland), the A’s are one of MLB’s most decorated franchises. Known for their colorful uniforms and the “Moneyball” era of the 2000s, they’ve produced stars like Rickey Henderson, Reggie Jackson, and Catfish Hunter.

Seattle Mariners — M’s | Mascot: Mariner Moose
Founded in 1977, the Mariners are the only team to never reach a World Series. However, they boast legends like Ken Griffey Jr., Ichiro Suzuki, and Edgar Martínez. Their 2001 team won a record-tying 116 games.

Texas Rangers — Rangers | Mascot: Captain (a horse)
Founded in 1961 (as the Washington Senators), the Rangers moved to Texas in 1972. They reached the World Series in 2010 and 2011, finally capturing their first championship in 2023. Icons include Nolan Ryan, Adrian Beltre, and Josh Hamilton.

National League (NL)

NL East

Atlanta Braves — Braves | Mascot: Blooper
The Braves are the only team to have won World Series titles in three different cities: Boston (1914), Milwaukee (1957), and Atlanta (1995, 2021). Legends include Hank Aaron, Chipper Jones, and Greg Maddux. Their 1990s rotation (Maddux, Tom Glavine, John Smoltz) is considered one of the best ever.

Miami Marlins — Fish, Fins | Mascot: Billy the Marlin
Founded in 1993, the Marlins are unique for winning two World Series titles (1997, 2003) despite never winning a division crown. Greats include Miguel Cabrera, Giancarlo Stanton, and Dontrelle Willis.

New York Mets — Mets, Amazin’s | Mascot: Mr. Met, Mrs. Met
Since their founding in 1962, the Mets have been New York’s underdog team. They won World Series titles in 1969 and 1986. Iconic moments include the “Miracle Mets” of ’69 and Bill Buckner’s infamous error in ’86. Stars include Tom Seaver, Mike Piazza, and David Wright.

Philadelphia Phillies — Phils, Fightin’ Phils | Mascot: Phillie Phanatic
Founded in 1883, the Phillies are one of MLB’s oldest franchises. They’ve won two World Series (1980, 2008) and featured stars like Mike Schmidt, Steve Carlton, and Chase Utley. The Phillie Phanatic is one of sports’ most famous mascots.

Washington Nationals — Nats | Mascot: Screech, Racing Presidents
The Nationals were originally the Montreal Expos before relocating in 2005. They won their first World Series in 2019, led by Max Scherzer, Stephen Strasburg, and Juan Soto. The Racing Presidents are a fan-favorite mascot race at Nationals Park.

NL Central

Chicago Cubs — Cubs, Cubbies, North Siders | Mascot: Clark the Cub
Founded in 1876, the Cubs are one of baseball’s most historic franchises. They endured a 108-year title drought before finally winning the World Series in 2016. Legends include Ernie Banks, Ryne Sandberg, and Sammy Sosa.

Cincinnati Reds — Reds, Big Red Machine | Mascots: Mr. Redlegs, Mr. Red, Rosie Red, Gapper
The first professional baseball franchise (founded 1869), the Reds have five World Series titles. Their 1970s dynasty, “The Big Red Machine,” featured Pete Rose, Johnny Bench, Joe Morgan, and Tony Pérez.

Milwaukee Brewers — Brew Crew, Crew | Mascot: Bernie Brewer, Barrelman
Founded in 1969, the Brewers have yet to win a World Series but reached the Fall Classic in 1982. Robin Yount and Paul Molitor are franchise icons, while Christian Yelich has been a recent star.

Pittsburgh Pirates — Bucs, Buccos | Mascot: Pirate Parrot
Founded in 1887, the Pirates boast five World Series titles. Roberto Clemente is their most revered player, remembered for both his play and humanitarian efforts. Other stars include Honus Wagner and Willie Stargell.

St. Louis Cardinals — Cards, Redbirds | Mascot: Fredbird
With 11 World Series championships, the Cardinals are second only to the Yankees in titles. Legendary players include Stan Musial, Bob Gibson, Ozzie Smith, and Albert Pujols.

NL West

Arizona Diamondbacks — D-backs, Snakes | Mascot: D. Baxter the Bobcat
An expansion team founded in 1998, the Diamondbacks won the World Series in 2001, defeating the Yankees in a thrilling 7-game series. Stars include Randy Johnson, Curt Schilling, and Luis Gonzalez.

Colorado Rockies — Rox | Mascot: Dinger
Founded in 1993, the Rockies reached their first and only World Series in 2007. They’ve been home to sluggers like Larry Walker, Todd Helton, and Nolan Arenado.

Los Angeles Dodgers — Dodgers, Boys in Blue | Mascot: None officially
Originally from Brooklyn, the Dodgers moved to L.A. in 1958. They have seven World Series titles, most recently in 2020. Legends include Jackie Robinson, Sandy Koufax, and Clayton Kershaw.

San Diego Padres — Pads, Friars | Mascot: The Swinging Friar
Founded in 1969, the Padres are still seeking their first World Series title. They’ve made two appearances (1984, 1998) and have fielded stars like Tony Gwynn, Trevor Hoffman, and Fernando Tatis Jr.

San Francisco Giants — Giants, G-men | Mascot: Lou Seal
Founded in 1883, the Giants have eight World Series titles, including three in the 2010s (2010, 2012, 2014). Legends include Willie Mays, Barry Bonds, and Buster Posey.

Final Thoughts

Each MLB team carries its own unique identity shaped by its city, history, legends, and fans. From the Yankees’ unmatched dominance to the Mariners’ unfulfilled dreams, from the Cubs breaking the “curse” to the Rays’ modern innovations, baseball is as much about heritage as it is about the present. Whether you cheer for the powerhouse franchises or the underdogs, the mascots and nicknames keep the sport colorful and accessible for every generation of fans.