Harry Mason scored three times for CU, all in the second half, the final one in the 89th minute, as Cumberland battled to the final horn.
Philip Sandgren came off the bench to net the final two goals for the Blue Raiders (18-1-1), who advance to Thursdays championship game against No. 2 University of Rio Grande. He scored in the 71st and 82nd minutes to give LWC a 5-3 advantage after Lebogang Molotos score in the 60th minute tied the match at three.
The Blue Raiders got on the board early in the first half, with Yazeed Davids taking a pass down the right side and firing a shot low to the far post, past CU keeper Sully Shuttuck, for a 1-0 advantage in the eighth minute. The teams played even until a questionable red card on Clark in the 24th minute put the Bulldogs a man down for the rest of the match.
LWC was the beneficiary of an inadvertent header by Cumberland in the 28th minute, with Nathan Gillespie trying to clear a ball that went off the cross bar, off the hands of Shattuck and across the goal line for an own goal and a 2-0 home team lead.
The Bulldogs cut the deficit in half just before the break, with Luke Wilson battling for a ball on the far left side of the box. He won the ball going toward the net and his low and hard shot to the far post beat LWC goalie Yuta Nomura in the 43rd minute and CU trailed 2-1 at intermission.
Mason turned a giveaway into a goal for Cumberland in the 47th minute and then booted a half-volley into the back of the net in the 54th minute after Mark Harrisons header on a long free kick was deflected right to the junior. Moloto tied the match six minutes later and then Sandgrens final two breakaway goals were the difference.
Masons final goal of the match came on the flick past the keeper after a long run down the left side and a cross by Rodrick Zacharias.