The National Lacrosse League is the professional league of men's indoor lacrosse in North America. Indoor lacrosse is a less violent version of box lacrosse. Crosschecking and sticks with solid shafts are not allowed; these differences allow more running than in box lacrosse.
The NLL was formed in 1997 from the Major Indoor Lacrosse League (MILL), with the decision to move from league ownership of all teams to individual team ownership.
Unlike other lacrosse leagues, which play in the summer, the NLL plays its games in the winter.
