It was the Spartans' first-ever appearance at the Tigers den, which opened in April of 2006.
Marcus McKimmy and Aaron Loewenthal each went 2 for 4 with two RBIs for the Spartans (14-8), who took a 7-4 lead into the bottom of the eighth.
The Spartans led 2-1 before opening things up with a three-run fourth inning.
Pacific (6-17-1) scored two runs and had the potential tying run at third with one out, but Spartans reliever Scott Sobczak escaped by getting a force-out at the plate and a strikeout.
The teams will meet one more time this season, again in Stockton, on Tuesday, April 17.
San Jose State begins a six-game home stand over a stretch of eight days this Tuesday night, March 20, against Southern Utah University.
First pitch of the Spartans' final tune-up for the 2007 Western Athletic Conference season is set for 6:00 p.m. at San Jose Municipal Stadium.