McCollum, who is averaging more than 21 points a game for Portland, has a strained left knee. He'll be re-evaluated next week, but at this point there's no timetable for his return. The injury comes at an inopportune time for the Blazers, who sit in fourth in the tight Western Conference standings with 12 games left to secure home-court advantage.
"Mentally, I don't want him to have to rush it," Lillard said about McCollum's return. "When he does come back I want him to be himself and be healthy, so in my mind, we're going to finish the regular season without him, maybe the last couple of games of the regular season. I think that's how I should think of it, knowing that we have to have a great effort for these last 12 games, planning on not having him out there."