USC beat Washington State on Friday and Saturday to begin 2017 conference play.
The USC bullpen helped in a tight win over San Diego State on Tuesday.
The Trojans edged the Bruins thanks to a big game from sophomore Lars Nootbaar.
The Trojans face off against San Diego, Michigan and UCLA in the annual event.
The Trojans took on Wake Forest in a weekend series and faced Duke on Monday.
The Trojans won after four hours on a walk-off single from junior Frankie Rios.
USC took all three games of the weekend set and beat Long Beach State on Tuesday.
The Trojans will take the field hoping to improve on a .500 campaign last season.
Head coach Dan Hubbs’ side aims to make its mark in a strong field of Pac-12 teams.
Andrew Triggs earns a chance with Oakland after a career in the minor leagues.