OKLAHOMA CITY (AP) — LSU's A.J. Andrews scored on an infield fly in the sixth inning to lead the Tigers to a 1-0 win over South Florida Saturday in the Women's College World Series.

The only two unseeded teams in the tournament, LSU (40-24) and South Florida (50-14) were locked in a pitcher's duel.

Hit by a pitch to start the sixth, Andrews moved to third after a long fly ball from Ashley Langoni bounced off center fielder Janine Richardson's glove at the warning track.

Allison Falcon lofted a fly ball two batters later forcing USF shortstop Kourtney Salvarola to the edge of the outfield grass. Andrews tagged from third and thrust her left hand in to grab a corner of the plate on a wide slide around USF catcher Laura Fountain.

LSU senior Brittany Mack finished off her 15th career shutout, allowing two hits and advancing LSU to a Saturday night elimination game against top-seeded California.

USF starter Sara Nevins again was plagued by footwork problems in the circle.

Against LSU, play was stopped three times for Nevins' illegal pitches but she was able to make the adjustment and allow two hits and an unearned run.

Nevins was called for seven illegal pitches on Thursday against Oklahoma resulting in her abandoning her changeup and the Sooners collecting five hits, including a two-run home run.