By Sam Laskaris Writer The Six Nations Rivermen will be looking to capture yet another league championship on Wednesday. But don’t expect members of the local Senior B lacrosse squad to be overly upset if they do not manage to accomplish that goal. The Rivermen will be squaring off against the host Oakville Rock in the third and decisive game of the Ontario Series Lacrosse (OSL) best-of-three championship final series. The match will be staged at the Toronto Rock Athletic Centre, beginning at 8 p.m. Regardless of the outcome of Wednesday’s contest, both the Rivermen and the Rock will still move on to participate in this year’s President Cup, the national Senior B tournament. The Oakville squad is hosting the Canadian tourney and thus receives an automatic berth in the…