Brown was the final of three players from the Micah Shrewsberry era to hit the portal.
The four-point overtime victory came after Penn State was down by 12 points in the fourth quarter.
The Lady Lions came back from a late-game deficit to advance in the tournament.
Marr leads the Nittany Lions in hits this season with 34.
It hasn't always been pretty this season, but sitting at No. 9 in the country with a record of 15-6, the Nittany Lions are finding ways to grind out wins.
After three-straight five-set matches, the Nittany Lions are finally getting a weekend off.