Lillard appeared to suffer the injury during Game 2, when Warriors center Kevon Looney landed on him while diving for a loose ball.
Trail Blazers guard Damian Lillard is dealing with separated ribs, but is playing against the Warriors in the Western Conference finals despite the ailment, he confirmed to reporters on Sunday. News of Lillard's injury was first reported by The Athletic's Shams Charania.
Lillard appeared to suffer the injury during Game 2 of the series, when Golden State center Kevon Looney landed on him while diving for a loose ball in the third quarter of the contest.
Lillard remained in the game despite holding his side after the play. Portland held a 13-point lead prior to Lillard's injury in Game 2—which occurred with under nine minutes left in the third quarter—but went on to lose the matchup 114–111.
"I don't think it's something that's affecting my game," Lillard told reporters Sunday, per the Los Angeles Times. "It's there but it's not something that's affecting anything that I'm doing. Obviously, you feel it."
The injury could bear responsibility for Lillard's recent struggles against the Warriors, who took a 3–0 series lead Saturday night following a 110–99 Game 3 victory in Portland. Lillard, an All-NBA performer last year, shot 5-for-18 from the field in the loss.