Kyrie Irving out vs. Clippers

CLEVELAND -- Cavaliers rookie guard Kyrie Irving has a concussion and is being kept out of Cleveland's game against the Los Angeles Clippers.

The Cavs announced Irving's injury a few minutes before tip-off Wednesday night. The team said Irving was kneed in the head during the fourth quarter of Tuesday night's game at Miami. He experienced a headache that worsened overnight and during pregame activity on the court. The Cavs said he has been diagnosed with a concussion.

Cavaliers coach Byron Scott did not mention anything about Irving during his pregame press briefing.

Ramon Sessions started for Irving, the No. 1 overall pick in this year's draft who is averaging 18 points and 5.1 assists per game.