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 two referees: a lead official and a trail official. In NLL games there are three officials per game. The goaltender's responsibility is to prevent the opposition from scoring goals by directly defending the net. Box lacrosse goaltenders equipment includes upper body gear (measuring no more than up and out off the shoulder—much larger than similar gear for field lacrosse or ice hockey goaltenders), large shin guards that must measure no more than at the knee, at the top of the shin and at the ankle, and a field lacrosse helmet or ice hockey goalie mask. The to radius area surrounding