What baseball team started its regular season in 2000, and is a member of the Liberty Division of the Atlantic League of Professional Baseball?
Long Island Ducks: The Long Island Ducks are an American professional baseball team based in Central Islip, New York. Long Island Ducks:  They are a member of the Liberty Division of the Atlantic League of Professional Baseball, which is not affiliated with Major League Baseball. Bethpage Ballpark:  Its first regular season game took place on May 14, 2000, when the Ducks played host to the Aberdeen Arsenal.
Long Island Ducks