The Ivy League school said Saturday night Brase has a torn anterior cruciate ligament. He will return for his senior season in 2016-17.
Brase was the team's second-leading scorer and leading rebounder the past two seasons, averaging 11.5 points and 7.5 rebounds. The forward was the league's ninth-leading scorer and fourth-leading rebounder last season.
Brase did not play in Princeton's season-opening win over Rider on Friday night.