Cumberland (14-2-2) advanced to the finals to face top-seeded Lindsey Wilson on Friday. The Blue Raiders beat Life 3-2 in the other semifinal match.
Williams scored in the 10th and 40th minutes to lift the Phoenix to the win. Cumberland finished the match out-shooting the Tigers (13-3-1) 11-7, including a 6-2 advantage in shots on goal.
Bennet Strutz collected a pair of saves to earn his ninth shutout of the season for the Phoenix.
Cumberland and Campbellsville played to a 1-1 draw during the regular season.
The men’s tournament final is slated for noon Friday at Joe Hood Field.