(Portland, OR) -- Trail Blazers guard CJ McCollum is out indefinitely after suffering a collapsed lung. He underwent a CT scan on Tuesday which found the injury, which he attained in Portland's game against the Celtics this past Saturday. The Blazers haven't announced how many games McCollum will miss, but he did not travel with the team for its game against the Warriors. The 30-year-old has averaged 20-point-six points per game in 24 starts this season.