NHL commissioner Gary Bettman says he's not going to get into a public debate on concussions following an NFL executive's acknowledgment the brain disease CTE can be linked to football.
Bettman says it's fairly clear that "playing hockey isn't the same as playing football."
The commissioner made the comments on the final day of the league's general managers meetings.
Jeff Miller, the NFL's senior vice-president for health and safety, made headlines earlier this week when he told a U.S. congressional committee's roundtable discussion about concussions that brain research on former NFL players "certainly" shows a link between football and CTE.
NFL officials have long denied proof of a connection between playing in the NFL and the condition called chronic traumatic encephalopathy.