The Hamilton Nationals are a men 's field lacrosse team based in Hamilton , Ontario , Canada , which began play in the 2009 Major League Lacrosse season , becoming the first - ever Canadian team in MLL history .
The Hamilton Nationals are a Major League Lacrosse ( MLL ) professional men 's field lacrosse team based in Hamilton , Ontario , Canada . 
 They began play in the 2009 season , becoming the first - ever Canadian team in MLL history .