Alvarez (5-0) went 7.2 innings, giving up one run on seven hits, striking out a season-high 10 while walking none. It was the second time in Alvarez's career that he has had over 10 strikeouts and the most since he struck out a career-best 13 versus Arizona on March 8, 2002.
Brad Davis went 3-for-5 with three runs, while Travis Udvarhelyi and Tim Hutting added two hits a piece. Hutting also extended his hit streak to a season-high 13 games.
Alvarez, after giving up Ryan Patterson's game-tying solo homer in the third, retired the next nine in a row, including five strikeouts. Aaron Hill's two-out single seventh broke up the string.
Jake Tompkins (0-2) went the first 5.0 innings, giving up four runs on five hits, striking out six.
The Beach struck first with an RBI single from Josh Buhagiar to lead 1-0 in the first before breaking a 1-1 tie in the fourth with a two-run homer from Adam Heether to lead 3-1. Tim Hutting's RBI single in the fifth extended his hit streak and gave the 49ers a 4-1 lead.
LBSU broke it open in the sixth, scoring three times off of reliever Greg Smith to lead 7-1. An RBI single from Chuck Sinlinger made it 5-1, before two runs scored on an infield single from Travis Udvarhelyi as LSU tossed it around the infield.
The flood gates opened some more in the eighth, as The Beach batted around, scoring five more unearned runs off of Smith to lead 12-1. After Aaron Hill's second error of the night kept the inning alive and gave LBSU an 8-1, Paul Macaluo hit a bases loaded, pinch hit, three-run double to make it 11-1. Tim Hutting followed with an RBI single.
The next two games of the series will be on Saturday and Sunday at 1 p.m. Mike Hofius was not in the lineup for the fourth straight game (ankle). This is LSU's first ever trip to the West Coast in its 110-year history.