Westcott currently has 18 points in 21 games played this season for the USHL's Sioux Falls Stampede.
The 2018 ACC Midfielder of the Year and All-American honoree will join the Penn State program this spring and be eligible immediately.
The Eagles (4-5) struggled with the Lady Lions speedy play as four Penn State players finished in double figures.
The Nittany Lions squandered a 4-1 lead against Princeton in Philadelphia Saturday night.
Penn State wrestling's 41-3 win against Arizona State was full of convincing wins from top to bottom, namely No. 2 Mark Hall's 4-0 win against No. 1 Zahid Valencia.
Penn State's big man, who has been sidelined thus far in the season, will not be returning to Penn State.