Like all other sports, lacrosse has evolved its fair share over the years.
Obviously in Canada, the indoor box variant which was born in 1931 has become the primary form of the game, but the modern outdoor field game has also seen its share of rule changes since the glory days of 1911 – let alone since William George Beers (1843-1900) codified the first set of playing rules in 1869 in his book Lacrosse: The National Game of Canada.
The biggest changes to the field game occurred in the decade prior to the professional heyday. The alterations that took place in the game between 1900 and 1910 were more drastic in nature than what has followed since 1910. Once the pro game became established, there were just two major changes that later came along: reduction of teams and playing field.