Dorsey will join his brother, Gabe, with the Tribe.
After a win against Johns Hopkins, the men moved to No. 5, while the women dropped to No. 18.
The Mike Rhoades era of Penn State men's basketball officially began Sunday afternoon with the commitment of the newly-hired head coach's first portal prospect.
The Atlantic 10 Player of the Year and Defensive Player of the Year will arrive in Happy Valley with two years of eligibility remaining.
The Nittany Lions dropped three straight to fall to 2-7 in conference play.
A Kevin Winkoff double-overtime game-winner gave the Nittany Lions the edge over Johns Hopkins Saturday night.