Major League Lacrosse (MLL) is a professional lacrosse league in the United States. The league officially began in 2001. It was established in 1999 by Jake Steinfeld, Dave Morrow and Tim Robertson. Jake Steinfeld is also famous for coming up with the "Body By Jake" line of videos and exercise equipment. Dave Morrow is the president of Warrior Lacrosse Equipment and a former lacrosse player.

The MLL season starts in May and runs until August. MLL rules have slight differences with traditional lacrosse rules. The changes include a two-point goal line 15 yards from the goal; a limit of three long-stick defensemen per each team; and a 60-second shot clock etc. The 60-second shot clock was initially a 45-second shot clock. That rule was altered in 2005.

Major League Lacrosse announced in 2005 that the league would include Los Angeles for the 2006 season. It was later announced that Denver, Colorado, would also have a team representing it in the MLL. The league was to later add teams from Chicago, Illinois and San Francisco, California. Those teams were to figure in the western division from the start of the 2006 season.

The league was initially divided into the American Division, constituting Boston, Bridgeport and Long Island; and the National Division, constituting Baltimore, New Jersey and Rochester, for a four-year period from 2001 to 2005. For the first two years, the league played a 14-game regular season. In 2003, the schedule was relaxed to a 12-game regular season.

The Major League Lacrosse teams in the Eastern division are: Baltimore Bayhawks; Boston Cannons; Long Island Lizards; New Jersey Pride; Philadelphia Barrage; and Rochester Rattlers.

The Western Conference has the Chicago Machine; Denver Outlaws; San Francisco Dragons; and Los Angeles Riptide

Lacrosse provides detailed information on Lacrosse, Lacrosse Equipment, Lacrosse Stick, Major League Lacrosse and more. Lacrosse is affiliated with Tennis Rackets.