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
Field lacrosse 1974 to promote and develop the game of men's lacrosse throughout the world. The FIL now sponsors the World Lacrosse Championship and Under-19 World Lacrosse Championships which are played under field lacrosse rules. It also oversees the World Indoor Lacrosse Championship played under box lacrosse rules, and the Women's Lacrosse World Cup and an under-19 championship under women's lacrosse rules. Lacrosse at the Olympics was a medal-earning sport in the 1904 Summer Olympics and the 1908 Summer Olympics. In 1904, three teams competed in the games held in Saint Louis, Missouri. Two Canadian teams, the Winnipeg Shamrocks and a team