The 24-year-old, who worked his way from the ECHL to a roster spot in Toronto, is likely done for the season.
Byron Froese has been one of the bright spots for the Toronto Maple Leafs this season as they endure a rebuild.
The 24-year-old, who was playing in the East Coast Hockey League last season, earned himself a roster spot with the Leafs in October.
Entering Saturday night’s action, Froese was third among active Toronto centers in face-off win percentage.
However, it appears he may have played his final game of the season.
Froese blocked a P.K. Subban shot off his right hand during the second period of the Leafs 4-1 loss in Montreal and left the game with what the team called an upper body injury.
TSN’s Mark Masters reported postgame that Froese suffered a broken hand.
The Manitoba native had two goals and three assists in 50 games this season.
Froese is in the first year of a two-year, $1.15 million contract.
The Leafs also lost forward P.A. Parenteau to an upper body injury on Saturday night.
Postgame Parenteau, who left the game in the first period, said he should be good to go by Monday.
"It’s something that happened yesterday morning in the gym right before I went on the ice," he said. "It was kind of a soreness in my neck and it was kind of spasms. It came back during the game, like early, and it was just better for me to get off the ice.”