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 of the goaltender. The playing area of box lacrosse is typically an ice hockey rink during the summer months. The playing surface is usually the concrete floor underneath the melted ice. Generally the playing area is to in length and to in width. The NLL plays on artificial turf placed on top of the ice. Some leagues, and teams that have dedicated box lacrosse arenas (such as the Iroquois), have outfitted their playing surface with artificial turf similar to the NLL. Box lacrosse goal dimensions are traditionally wide by tall. In the NLL, the dimensions are slightly larger at wide