Internet League Blaseball

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Internet League Blaseball (ILB) is a professional Blaseball organization based on the Immaterial Plane. It is the second-oldest known professional Blaseball league, succeeding Ultra League Blaseball. 24 Teams from North America, Japan, Hawai'i, and Hades currently play in the league. The league officially returned from siesta on July 20th, 2020 at the beginning of Season 1. During the Expansion Era, four Expansion Teams descended into the League, increasing the number of teams in the league from 20 to 24.

At the end of every season, the best performing team from each league faces off in the Internet Series to determine the champion of Blaseball. Following the passing of the Underachiever decree in Season 19, the worst-performing team from each league simultaneously face off in an Underbracket to determine the Underchampion of Blaseball.

The Baltimore Crabs currently hold the record for the most Internet Series wins with 5 championships, having ascended after the third. The Atlantis Georgias and Ohio Worms are recorded to have 4 championship wins as well, having apparently taken place beyond the scope of Internet League Blaseball. Since the end of Season 12, teams now instead Evolve for every three championship wins, with the Hades Tigers, Atlantis Georgias, Ohio Worms, Baltimore Crabs, and Core Mechanics having reached Base 1 Evolution.

Currently-known entities within the ILB's management include:

The league also employs Umpires to watch over the games and keep things under control.

ILB games are broadcast both on the internet and the radio. Further means of Blaseball dissemination are being researched.


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The ILB is known to have been reformed multiple times. The league was first created upon Ultra League Blaseball being Re-Named in the Season A Election in September 1983, and was then active for at least four seasons from 1984–1987. At some point this iteration of the league ceased to be active, until the ILB was reformed on The First Day (2nd Edition) in January 2000. This iteration, too, would at some point become inactive, and the ILB would not enter its modern iteration until its eventual return at the beginning of Season 0 on July 12th, 2020.

Since its return in Season 1, the ILB has run for a total of 21 Seasons, split between the Discipline Era (Seasons 2-10) and the Expansion Era (Season 12 onwards). Between Seasons 3 and 4, The Commissioner called for the first ever Grand Siesta, halting ILB activity for two weeks to conduct league maintenance. After the Discipline Era concluded, the Boss called for a second Grand Siesta between Seasons 11 and 12, which lasted eighteen weeks. During the time period in between those seasons, the League hosted the four-week long Coffee Cup.

Known Seasons

Pre-History I

Pre-History II


The Discipline Era

The Expansion Era

ILB Sub-Leagues

See the main article on this topic: Leagues

From its inception until Season 5, the ILB was divided into two smaller Sub-Leagues, the Good League and the Evil League, which were each divided into a Lawful and Chaotic division.

From Season 6 onwards, the ILB has been divided into the Wild League and the Mild League, which are each divided into a High and Low division. The divisional placement of each team was originally based on the teams' performance in Season 5, though a few teams have changed divisions since then.