[2][3] Brooklin plays in the Major Series Lacrosse (MSL) league (formerly known as Senior "A").

Both league champions compete each September for the Mann Cup, one of the most historic and treasured sports trophies in Canada.

Throughout team history, the Brooklin Lacrosse Club has always been a community based team that represents the best box lacrosse players from Brooklin, Whitby, Durham and nearby regions.

The lacrosse club is a non-profit, volunteer operated organization.

[4][5] Mann Cup Canadian Champions (7) Ontario Senior Champions (10) Mike Kelly Memorial trophy (Mann Cup MVP) Bucko MacDonald Trophy (top scorer) Jim Murphy Trophy (regular season MVP) Gene Dopp Memorial Trophy (rookie of the year) Merv McKnzie Trophy (most valuable defenceman) Harry Lumley Award (fewest goals against) As of 4 March 2012[update][citation needed] As of June 2020[update][6] In addition to these players, the 1985, 1986, 1987, 1988, 1989, 1990, and 1991 teams were inducted.