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 a position called rover, was eliminated. The goalkeeper can be replaced by another runner, often when a delayed penalty has been called on the other team or at the end of games by teams that are behind to help score goals. A player's lacrosse stick must be between and in length (youth levels may use shorter sticks). In most box lacrosse leagues, the use of a traditional wooden stick is allowed. However, almost no lacrosse players use wooden sticks anymore, preferring aluminum or another metal, and a plastic head. In the NLL, wooden lacrosse sticks are not allowed. Besides a