The Six Nations Rivermen and Brooklin Merchants are in a dogfight for the Ontario Series Lacrosse Championship. After winning Game 1 in the best-of-five series 8-4 on the road on Friday, Six Nations suffered a 10-9 loss to Brooklin at home on Sunday. The winner of the series advances to the Canadian Lacrosse Association’s Presidents Cup national senior B championship in Edmonton from Aug. 30 to Sept. 5. MAJOR SERIES LACROSSE – Six Nations ChiefsThe Six Nations Chiefs are one series away from booking their berth in the Mann Cup Canadian senior men’s lacrosse championship. Facing Cobourg in a best-of-three semifinal series, the Chiefs swept the Kodiaks to earn a spot in the Major Series Lacrosse championship series.