LMU dropped a 4-1 decision to Pepperdine on Friday afternoon and now faces an elimination game.
Brenton Arriaga tossed a career-high 6.1 shutout frames to record a victory over San Diego State.
An error charged to Tanner Donnels in right field opened the door to a three-run Santa Clara eighth.
Santa Clara collected three homers and three triples en route to beating LMU 10-2.
LMU scored three runs in the seventh inning to erase a 3-1 deficit and earn the victory.
Sixth-year head coach Jason Gill previews the 2014 LMU baseball season.
2014 WCC Baseball Championship Photos by Kyle Terada
PCH Cup win over Waves
LMU Baseball vs. Oregon - February 21, 2014
Non-conference baseball from Page Stadium
LMU Baseball vs Oregon - February 22, 2014