Jonni Parker tied her season-high of 17 kills in the 25-17, 21-25, 25-18, 25-15 victory over the Boilermakers.
The Nittany Lions salvaged a split thanks to six different goal-scorers -- including a highlight-reel tally from Evan Barratt.
The Nittany Lions' offense exploded in the second half for a big victory over Wagner Saturday afternoon.
Penn State will play the winner of Northwestern-Iowa on Sunday, November 10 at 2 p.m.
The Nittany Lions couldn't finish offensively in a cagey affair against the Spartans.
Kaitlyn Hord, Tori Gorrell, and Serena Gray each recorded more than 10 kills in the 25-21, 25-13, 25-18 win over the Hoosiers.