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
Canadian University Field Lacrosse Association Referee-in-Chief. Only current students registered at their respective universities with a full course load are deemed eligible to play in CUFLA competitions. Players who have played professional field lacrosse (such as Major League Lacrosse) are prohibited from playing in CUFLA. However, players who play professional box lacrosse (such as the National Lacrosse League) are eligible to play. Throughout the years, the league has seen many current and former NLL players scattered throughout various teams. Many current and former players have met with a great deal of success representing their countries or playing professional lacrosse in the National Lacrosse League and