The St. James, New York native has been an elite player and leader for the Nittany Lions during his five years in Happy Valley.
He is the second Nittany Lion taken in the first round in the last two years following Grant Ament, who was drafted No. 1 overall by Archers LC last year.
The Nittany Lions are back in the poll's top 20 following a thrilling win in Columbus on Saturday.
Harrar's return to Penn State men's basketball gives the team an important go-to leader moving forward.
Penn State baseball salvaged the three-game set against the Buckeyes with a win in the final game of the series.
The No. 3 Nittany Lions and No. 4 Blue Jays spilt the season series in 2021.