J.R. Smith ejected for cheap shot on Jae Crowder

J.R. Smith was ejected from Game 4 of the Cavaliers-Celtics first-round series on Sunday after striking Boston's Jae Crowder in the head.

While the players battled for position under the basket, Smith swung his right arm at Crowder. His right fist appeared to catch Crowder in the face.

Crowder remained on the ground for several seconds after the hit. He was helped off the floor by teammates.