Lacrosse is a spring sport played throughout the United States at all levels from youth through the professional league. Modern lacrosse has roots in the cultural tradition of the Native American Iroquois people, inhabiting what is now New York, Pennsylvania, and other parts of the Northeastern US and lower parts of Ontario and Quebec. Lacrosse may have been developed as early as 1100 AD among indigenous peoples on the North American continent. By the seventeenth century, it was well-established. It was documented by Jesuit missionary priests in the territory of present-day Canada. Men’s lacrosse is played on a field 110 yds. long by 66 yds. wide between teams consisting of 10 players: 3 attackmen, 3 midfielders, 3 defensemen and a goal keeper.