MidAmerica Nazarene made a first-half goal stand up for a 1-0 decision over the sixth-ranked Vikings, who tied No. 2 Baker for the league's regular season title and was the tourney's top seed.
The Pioneers applied pressure during the 13th minute of the match, putting three shots on goal during a 31-second span. Senior goalkeeper Adria Borras stopped the first two, from junior Trent Remmich and senior Cam Cundiff, but Cundiff knocked in the rebound of his own shot to put MidAmerica on the board.
Sophomore Chris Ericksson came up with three saves for the Pioneers during the rest of the half, and his defense blocked an on-target attack from sophomore Carlos Suarez Fernandez.
Valley turned up the heat after the break, with a 7-3 advantage in attempts. Senior Eduardo Da Silva, sophomore Nicholas Alexander and Suarez Fernandez each missed the frame in the first 13 minutes of the second half.
Ericksson rejected drives from senior Roderick Owusu-Andrews, sophomore Miguel Jiminez and Alexander during the final eight minutes. With eight saves, Ericksson recorded his sixth shutout of the season and ranks 12th in the NAIA with 0.75 goals per game.
MidAmerica (12-7-1) will play for the championship Friday at Baker, the Wildcats knocking off 14th-ranked Benedictine, 3-2.
The Vikings (14-2-1) should still qualify for the NAIA playoffs for the second year in a row, their high ranking making it likely they will receive one of the six at-large bids.