As of 2023, it consists of 29 teams: 26 in the United States and 3 in Canada. The league has played since 1996. Each year, it plays a league which determines entry into the playoffs.
In 2023, the league has 29 teams, including 26 from the United States and 3 from Canada. Since its founding in 1996, the league holds an annual contest to determine playoff contenders.