This list includes 18 Baseball Teams that start with O, from “Oaks” to “Owlz”. Most are professional, notable minor or collegiate programs with recognizable city or regional names. Use it for quick research, roster checks, or editorial reference.
Baseball Teams that start with O are clubs whose common names begin with the letter O. Many names, like “Oaks,” reflect early team-naming traditions tied to local identity and natural landmarks.
Below you’ll find the table with Team, Country, City, League.
Team: The common or official team name helps you identify each entry quickly and match it to rosters or headlines.
Country: Indicates the nation where the team is based, so you can filter by geography and competition level.
City: Provides the team’s home city or region so you can link names to local markets, venues, and histories.
League: Names the league or competition tier to show level of play and help you find schedules and standings.
Baseball Teams that start with O
| Team Name | Country | City | League/Level |
|---|---|---|---|
| Oaks | United States | Oakland | PCL (defunct) |
| Oilers | United States | Tulsa | MiLB – Texas League (defunct) |
| Oranje | Netherlands | National Team | National Team |
| Orioles | United States | Baltimore | MLB |
| Orioles | Dominican Republic | Boca Chica | Dominican Summer League |
| Orioles | United States | Sarasota | MiLB – Florida State League (defunct) |
| Orix Buffaloes | Japan | Osaka | NPB |
| Ornithorynques | France | Chartres | French Division 1 |
| Orphans | United States | Brooklyn | MLB (defunct) |
| Osprey | United States | Missoula | Pioneer League (defunct) |
| Otters | United States | Evansville | Frontier League (Ind.) |
| Outlaws | United States | Billings | Pioneer League (Ind.) |
| Outlaws | United States | Chico | Independent (defunct) |
| Owls | United States | Boca Raton | NCAA Division I |
| Owls | United States | Houston | NCAA Division I |
| Owls | United States | Kennesaw | NCAA Division I |
| Owls | United States | Philadelphia | NCAA Division I (defunct) |
| Owlz | United States | Orem | Pioneer League (defunct) |
Descriptions
Oaks
A charter member of the Pacific Coast League, the Oaks were a legendary minor league team from 1903-1955. They won several titles and featured many future major league stars.
Oilers
A historic minor league team that played for decades in the Texas League, serving as an affiliate for teams like the St. Louis Cardinals before the franchise moved in 1976.
Oranje
The national baseball team of the Kingdom of the Netherlands, known as “Oranje.” They are a perennial powerhouse in European baseball and a competitive force in the World Baseball Classic.
Orioles
A charter member of the American League, the Baltimore Orioles are one of MLB’s historic franchises, with multiple World Series titles and a passionate fanbase at Camden Yards.
Orioles
A rookie-level affiliate of the Baltimore Orioles, providing a first step in professional baseball for young Latin American prospects in the Dominican Summer League.
Orioles
A former Class A-Advanced affiliate of the Baltimore Orioles that played in the Florida State League. The team ceased operations after the 2009 season.
Orix Buffaloes
A major professional team in Japan’s NPB league, formed by a merger. Often called ‘Orix,’ they have featured stars like Ichiro Suzuki and won multiple Japan Series titles.
Ornithorynques
The “Platypuses” of Chartres are a top-tier team in the French Division 1, showcasing the global reach and unique team names of baseball in Europe.
Orphans
An unofficial but common nickname for the Brooklyn baseball club in the National League around the turn of the 20th century, a team that would later become the famous Dodgers.
Osprey
Formerly a rookie-level affiliate of the Arizona Diamondbacks in the Pioneer League. The team was a staple of Montana baseball before MiLB’s 2021 restructuring.
Otters
A professional independent team in the Frontier League, an MLB Partner League. The Otters have a long history in Evansville, Indiana, dating back to 1995.
Outlaws
An independent baseball team in the Pioneer League, representing Billings, Montana. The league was previously affiliated with MiLB and is now an MLB Partner League.
Outlaws
A now-defunct independent team that played in the Golden Baseball League. They were notable for signing female Japanese pitcher Eri Yoshida in 2010.
Owls
The college baseball team for Florida Atlantic University. A competitive NCAA Division I program that regularly competes for conference championships and NCAA tournament berths.
Owls
The powerhouse college baseball program of Rice University. The Owls won the College World Series in 2003 and are known for consistently developing top-tier professional talent.
Owls
Representing Kennesaw State University in Georgia, the Owls are a respected NCAA Division I program that has also appeared in the College World Series at the D-II level.
Owls
The former baseball program for Temple University, which had a long history before being discontinued in 2014. The Owls appeared in two College World Series in the 1970s.
Owlz
A former rookie-level affiliate of the Los Angeles Angels that played in the Pioneer League until 2020. The team was known for its unique ‘Owlz’ spelling and logo.