CJ McCollum exits with sprained ankle, status for Saturday uncertain

McCollum heads to locker room with sprained ankle (0:34)

CJ McCollum's night ends early after suffering a left sprained ankle as he drives to the basket in the second quarter vs. the Mavericks. (0:34)

DALLAS -- The Portland Trail Blazers are uncertain about the severity of the left ankle sprain that forced shooting guard CJ McCollum to exit Friday night's 120-112 loss to the Dallas Mavericks early in the second quarter.

"Usually, the second day is the worst," McCollum said. "So we'll see how it feels tomorrow. Get some treatment, try to compress it and see how it feels."

The Blazers have the second game of a road back-to-back set Saturday night against the Oklahoma City Thunder.

McCollum, Portland's second-leading scorer with an average of 21.5 points per game, was not wearing a protective boot after the game. He walked slowly as he exited the American Airlines Center.

McCollum was injured when he landed on Mavs power forward Maxi Kleber's foot after driving to the basket with 8 minutes, 4 seconds remaining in the second quarter. The Trail Blazers announced minutes later that McCollum would not return, and he received treatment in the locker room the rest of the game.

Portland reserve guard Gary Trent Jr. exited the game in the second half due to an illness.

The Trail Blazers have been hit hard by injuries. Center Jusuf Nurkic has yet to play this season due to a broken leg suffered late last season. Power forward Zach Collins is recovering from surgery to repair a dislocated left shoulder suffered Oct. 27. Small forward Rodney Hood suffered a season-ending torn Achilles tendon Dec. 6.