The constant chewing of his mouth guard is a mainstay when Clayton Keller is on the ice, year after year, for the Arizona Coyotes.
But Keller isn't the same player as the one he was even last season, and who knows, he might never be again.
The early season talk was the added weight Keller put on in the offseason, as asked of him by the team's decision-makers to counter physical play from opponents taking advantage of his slighter frame. Keller, always possessing the offensive ability to be a factor, bulked up and returned to the Coyotes under a new head coach and new system.