Box lacrosse The roots of indoor lacrosse are obscure, but its invention has been attributed to one Paddy Brennan, a field lacrosse player and referee from Montreal, who, being annoyed by the constant slowing of play from balls going out of bounds in the field game, experimented with indoor games at the Mount Royal Arena during the early 1920s. Joseph Cattarinich and Leo Dandurand, owners of the National Hockey League's Montreal Canadiens in the 1920s, led the participating ice hockey arena owners to introduce the new sport. In the 1930s, 6 v 6 indoor lacrosse came to be played in the summer
Box lacrosse by tall. These nets are significantly smaller than field lacrosse nets which measure wide by tall. A traditional game played under the rules of the Canadian Lacrosse Association consists of three periods of 20 minutes each (similar to ice hockey), with the teams changing ends each period. The NLL plays four 15-minute quarters rather than three periods. If the game is tied at the end of regulation play, a 5-minute overtime (15 in NLL) can be played. Overtime may or may not be sudden victory, depending on the league. Each period, and after each goal scored, play is restarted with