The Walljasper family just had a Saturday to remember.

Freshman Lindsey Walljasper helped the Sierra High softball team win its third Sac-Joaquin Section Division IV championship in five years at Stockton’s Arnaiz Stadium. Meanwhile, big sister Allie Walljasper was doing big things in another state.

In an ESPN-televised game, the elder Walljasper continued her impressive season as a true freshman for No. 8-ranked Louisiana State University, throwing 9 1/3 innings in a 3-2 win over Nebraska that advanced the Tigers to Sunday’s NCAA Baton Regional final. Carley Hoover got the save after retiring two straight batters with two base runners on.

It was a must-win contest for LSU (48-12), which had lost to Arizona State 1-0 earlier in the day. The Tigers avenged the defeat in the final round Sunday, beating the Sun Devils twice for a berth to the Super Regionals. After a 5-0 win forced a rubber match, Walljasper got the starting nod on her 19th birthday. She allowed three runs (one earned) on eight hits with three strikeouts in 6 1/3 innings before again getting replaced by Hoover, the eventual winning pitcher in a wild 4-3 triumph over No. 23 Arizona State. Bianka Bell belted the game-winning hit in the bottom of the ninth inning.

Walljasper was named to the NCAA All-Baton Rouge Regional Team, with Hoover earning MVP honors.

LSU is making its first Super Regional appearance since 2012 and will face Arizona this Saturday at Baton Rouge. The best-of-three series ends Sunday night, if necessary.

Walljasper — a four-time Manteca Bulletin All-Area MVP and two-time section champion for Sierra — is part of a formidable 1-2 punch from the pitcher’s circle along with Hoover, a freshman transfer from Stanford. Walljasper is 14-5 with a 1.70 ERA and 96 strikeouts in 119 1/3 innings.