Actually... "Players may only play for one team in this conference. Any player on more then one roster will result in the forfeiture of all games scheduled for both teams and the removal of the player from the conference. Each coach should check with the player’s parents to ensure that the player is only on one roster."

http://www.eteamz.com/hcrpsports/files/HCClubLacrosseLeagueRules.doc