The Anteaters, who finished second in the Big West Conference, failed to hold on to a pair of one-run leads in the ninth and 11 innings.
LSU (41-20) won the game on a two-run double by Trey Watkins off reliever Eric Pettis.
Irvine (37-20) will meet UCLA or Kent State in an elimination game at 2 p.m. today at Jackie Robinson Stadium in Westwood.
Bergman, a former All-Mission League first-team member, is slated to start today's contest.
Baillie Kirker (Crescenta Valley High, 2009) freshman infielder, University of Arizona softball: Kirker, the reigning All-Area Player of the Year, and the 10th-seeded Wildcats opened the College Softball World Series in Oklahoma City with a 9-0 loss to 15th-seeded Tennessee on Thursday. The game was called after five innings because of the mercy rule.
Kirker went hitless in two plate appearances, capped by fouling out to third in the fifth. The first baseman had one assists and four put outs.
The Wildcats (48-12) will face PAC-10 rival Washington in an elimination game at 11:30 a.m. PDT today.
Through Thursday, Kirker is batting .185 (25 for 135) with three doubles, seven home runs and 27 runs batted in.
In 54 games, Kirker has scored 23 runs and posted a .990 fielding percentage.
Kathryn Poet (Flintridge Sacred Heart Academy, 2007) junior outfielder, University of Missouri softball: Things didn't start off well for Poet, a former All-Area member, and the Tigers. Missouri held a 2-1 lead entering the top of the seventh inning against Hawaii in an opening-round game of the College Softball World Series on Thursday in Oklahoma City.
Hawaii, seeded 16th, scored two runs in the inning to post a 3-2 win and send ninth-seeded Missouri (51-12) into the loser's bracket.
Missouri, making its third consecutive trip to the World Series, will face fourth-seeded Florida today at 9 a.m. PDT.