The New York Rangers were without assistant coach Lindy Ruff for the team's Wednesday night game after he suffered a concussion during Tuesday's practice.
Ruff was injured when he fell and hit his head on the ice. In addition to the concussion, the veteran coach also had a gash on the back of his head.
"We're not sure if he stepped on a puck or a puck hit him, but he hit his head on the ice," Rangers head coach Alain Vigneault said. "We had to take him off the ice. He went to the hospital.