Box lacrosse 1998, the NLL entered into the Canadian market for the first time with the Ontario Raiders. Although 5 of the league's 9 teams are based in American cities, more than two-thirds of the players are Canadian. During play, a team consists of six players: a goaltender and five "runners". A runner is any non-goalkeeper position player, including forwards, transition players, and defenders. Runners usually specialize in one of these roles and substitute off the field when the ball moves from one end to the other. When the sport originated teams played with six runners. However, in 1953 the sixth runner,
Field lacrosse ten players on the field: a goalkeeper; three defenders in the defensive end; three midfielders free to roam the whole field; and three attackers attempting to score goals in the offensive end. Players are required to wear some protective equipment, and must carry a lacrosse stick (or crosse) that meets specifications. Rules dictate the length of the game, boundaries, and allowable activity. Penalties are assessed by officials for any transgression of the rules. The game has undergone significant changes since Beers' original codification. In the 1930s, the number of players on the field per team was reduced from twelve to