A 'lower body injury' has sidelined one of the biggest names in the NHL. 

Gary Bettman was supposed to be the keynote speaker at Winnipeg's Rady Jewish Community Centre Sports Dinner Thursday night. 

But this afternoon came word the NHL commissioner can't make it because of a kidney stone. 

A news release says the attack is also called a 'lower body injury.' 

It says Bettman was "looking forward to being part of tonight's Rady Sports Dinner." 

NHL Deputy Commissioner Bill Daly will fill in for Bettman tonight. 

The event, which is open to the media, features a roundtable discussion about the Winnipeg Jets and hockey. 

Mark Chipman, executive chairman of True North Sports and Entertainment, Kevin Cheveldayoff, the Jets' general manager and Paul Maurice, the team's head coach, are all on the panel.