In honor of Major League Baseball’s Opening Day this week, we’ll be diving into the history and naming of each of the teams.

Why Do Baseball Teams Have Nicknames?

Baseball is where nicknames really took off.

In the early days, teams didn’t officially brand themselves the way they do now. Newspapers and fans started assigning names based on:

Uniform colors
Star players
Local industries
Inside jokes that just… stuck

Over time, those nicknames became official.

And in baseball, more than any other sport, those names carry history — sometimes from cities the team doesn’t even play in anymore.

MLB — Franchise by Franchise

American League

New York Yankees

Originally the Highlanders, “Yankees” was a newspaper shorthand that stuck — a nod to American identity.

Boston Red Sox

Named after their red stockings, part of a trend of color-based names in early baseball.

Toronto Blue Jays

Named after the blue jay bird, chosen through a fan contest in 1976.

Tampa Bay Rays

Originally Devil Rays (a type of stingray). Rebranded to “Rays” to represent both the animal and Florida sunshine.

Baltimore Orioles

Named after the state bird of Maryland.

Chicago White Sox

Named for white stockings, shortened to “Sox” for newspaper headlines.

Cleveland Guardians

Renamed from “Indians” in 2021. Inspired by the “Guardians of Traffic” statues on a Cleveland bridge.

Detroit Tigers

Likely named after a local military unit called the “Detroit Light Guard.”

Kansas City Royals

Named after the American Royal livestock show, a major Kansas City event.

Minnesota Twins

Represents the Twin Cities: Minneapolis and St. Paul.

Houston Astros

Originally the Colt .45s. Renamed to reflect Houston’s role in the space program.

Los Angeles Angels

“Angels” is simply the English translation of “Los Angeles.”

Oakland Athletics

One of the oldest names in baseball. “Athletics” dates back to Philadelphia and the name traveled.

Seattle Mariners

A nod to Seattle’s maritime culture.

Texas Rangers

Named after the historic Texas law enforcement agency.

National League

New York Mets

Short for “Metropolitans.” A nod to New York’s earlier baseball teams.

Atlanta Braves

One of baseball’s oldest names. Originated in Boston and the name moved with the franchise.

Philadelphia Phillies

A shortened version of “Philadelphians.” Simple, direct, very old-school.

Washington Nationals

A classic, traditional name used by multiple Washington teams over time.

Miami Marlins

Named after the fast-swimming fish found in Florida waters.

Chicago Cubs

Originally the White Stockings. “Cubs” referred to the team’s young players and it stuck.

St. Louis Cardinals

Named after the bright red bird and the color of their uniforms.

Milwaukee Brewers

A nod to Milwaukee’s beer-brewing industry.

Pittsburgh Pirates

Originally meant as an insult — accused of “stealing” players. They embraced it.

Cincinnati Reds

Short for “Red Stockings.” One of the oldest team identities in baseball history.

Los Angeles Dodgers

Originally the Brooklyn “Trolley Dodgers.” Named for people dodging streetcars in Brooklyn. The name moved west.

San Francisco Giants

Originally from New York. “Giants” reflected the team’s larger-than-life players.

San Diego Padres

Spanish for “Fathers,” referencing Spanish missionaries.

Arizona Diamondbacks

Named after the venomous rattlesnake native to Arizona.

Colorado Rockies

Named after the Rocky Mountains.

What Makes MLB Different

Baseball names feel older.

Because they are.

They come from:

Newspaper shorthand
Uniform colors
Migration across cities
Inside jokes turned permanent

Some names make perfect sense.

Some only make sense if you know the history.

And some?

Only make sense because we’ve accepted them.

Nobody in Los Angeles thinks about trolley cars anymore.

Nobody questions why Pittsburgh is called the Pirates.

Because over time, the nickname stops being literal.

It becomes legacy.

Question for readers:
Which MLB nickname has the best story and which one feels the most random?