Centaurus Cup – Also known as the Southern Union Internationals, is contested by the senior men’s national teams of the eight nations of the Southern Union. Beginning in the 1906 season, it is the oldest international baseball tournament in the world. The championship is awarded every 5 years except in 1941 when it was not held because of the Second World War.

Albaland Baseball League – The highest level of baseball in the country and the only level where all teams are professional. Unlike other professional and semi-professional leagues within the Southern Union, teams in the Albaland Baseball League have always played 60 game schedules, (twice at home and twice away) against all opponents compared to three games at home and three away, with games traditionally taking place on Saturdays and Sundays only.

Alba Shield – Is an annual knockout baseball tournament held in the country of Albaland. The tournament has been held since 1907 and is the oldest baseball competition in the country. The tournament features teams from across Albaland from all levels of the Albaland baseball pyramid – including professional, semi-professional and amateur – competing in a single-elimination format until a champion is crowned.

Baseball Meisterschaft – Is a professional baseball league in Günsovölk. At the top of the Günsovölk baseball league system, the Baseball Meisterschaft is Günsovölk’s primary baseball competition. Teams have always played each other 6 times over two 3-game series (three games at home, three games away) during a season, which are played from Friday to Sunday between the months of April and November. The team that has won the most games during a season is declared the champion.

Topklasse Divisie – Known locally as Topklasse, is a professional baseball league in Houtmansland. It is the highest level of baseball in Houtmansland and the only level that is played professionally. The team that has won the most games during a season is declared the Champion.

I-League – Officially known as Ianoian League, is a professional baseball league in Ianoia. At the top of the Ianoian baseball league system, I-League is Ianoia’s primary baseball competition.

Social Cup – A long-running annual baseball tournament in the country of Ianoia that follows a single-game knockout format to determine the champion. It is also notable for being the first competition in the Southern Union to be open to both professional and amateur clubs.

Super Ligan – A professional baseball league in Koana Islands. It is the highest level of the men’s Koanian baseball pyramid. The competition is the oldest professional baseball league in Southern Union baseball history, beginning play in 1895. Teams that finish at the bottom are relegated to Division Ett.

Division Ett – Formed in 1900, it is the second highest division within the Koanian baseball pyramid. Teams that finish near the top are promoted to the Super Ligan.

Nationella Basebolligan (Defunct) – Commonly known as the NBL, it was a league in Koana Islands during the early days of Koanian Baseball. Formed in 1896 and beginning play in 1897, the NBL was created by Niclas Nordin, owner of BK Embleton. It folded at the end of the 1899 season with teams joining the new Division Ett.