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
Lacrosse during the late 1800s and first half of the 1900s was primarily a regional sport centered around the Mid-Atlantic states, especially New York and Maryland. However, in the last half of the 20th century, the sport spread outside this region, and can be currently found in most of the United States. According to a survey conducted by US Lacrosse in 2016, there are over 825,000 lacrosse participants nationwide and lacrosse is the fastest-growing team sport among NFHS member schools. Field lacrosse is the men's outdoor version of the sport. There are ten players on each team: three attackmen, three midfielders,