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
Women's lacrosse after a goal is scored or any time the requestor's team is in clear possession of the ball. If a possession timeout is called, players must leave their sticks in place on the field and return to that same place for the restart of play. No substitutions are allowed during this stoppage of play. The rules of women's lacrosse differ significantly from men's lacrosse. The details that follow are the USA college rules. International women's lacrosse rules are slightly different. The women's lacrosse game saw numerous rule changes in 2000. Modifications included limiting the number of players allowed between the