Boston Celtics star Jaylen Brown finished the season with a partially torn right meniscus, sources told ESPN.
Brown had been playing in pain during the last month of the regular season and the playoffs, which concluded with Friday's Game 6 loss to the New York Knicks in the Eastern Conference semifinals.
He will be evaluated this week to determine if surgery is needed, sources said.
ESPN previously reported that Brown began receiving pain injections in his knee. Those injections began in March, sources said.
Brown missed the Celtics' final three regular-season games with the injury, but was able to modify his game and play through pain in order to be available for the playoffs, in which he averaged 22.