Detroit Red Wings defenseman Niklas Kronwall left the ice on a stretcher after he was pushed into the boards early in the first period of Thursday night's game against the Colorado Avalanche in Denver.
Kronwall's head slammed against the boards at 2:17 of the first period after a hit by Colorado's Cody McLeod, who received a five-minute boarding major and a game misconduct.
Kronwall was down on the ice for several minutes while receiving attention from trainers before he was placed on a stretcher. He was responsive and moving his extremities.
After undergoing tests at the arena, Kronwall was diagnosed with a concussion. He also had cuts on his right ear.