High Quality Content by WIKIPEDIA articles! The National Lacrosse League (NLL) is a Mens Professional indoor lacrosse league in North America. It currently has 11 teams; three in Canada and eight in the United States. Unlike other lacrosse leagues which play in the summer, the NLL plays its games in the winter. Each year, the playoff teams battle for the Champion's Cup. Lacrosse is popular in Canada, mainly in Southern Ontario and British Columbia; lacrosse is Canada's official summer sport. The sport also has a reasonable profile in the Northeastern United States, primarily for historic reasons or due to high profile college programs. Elsewhere in North America, though, lacrosse is still considered a marginal sport at best; consequently, franchise foldings and relocations have been common in the NLL.