The Nittany Lions last played in the Gavitt Games in 2019 when they beat Georgetown 81-66.
The Nittany Lions and the Tigers will face off for the first time since 2005.
The Class of 2024 prospect sits at No. 39 in national recruiting rankings.
Harrar is Penn State men's basketball's first to earn the award since 1995, while Parker is women's volleyball's first representative since 2018.
Penn State men's basketball released its opponents and locations for its 20-game 2022-23 conference slate.
Harrar will compete for Purdue's "Men of Mackey" team in the 64-team single elimination competition.