As an adjective, "lax", to me, means "lazy" and "half-assed".
And "commonly known" doesn't mean anything if there is no, or nobody cares about, lacrosse in your area. Where I grew up, it was mainly simply a sport that we read about in school, and we knew that it was once played by Native Americans ages ago. I might've hit puberty by the time I heard of it being played currently.
Maybe I'm just showing my age.. lol