It's been a rough training camp in Toronto with several players suffering unfortunate injuries, including 3 members of the Leafs' Core 4.
Auston Matthews is already sidelined with an undisclosed upper-body ailment that is believed to be minor.
William Nylander was struck in the head and left Thursday's game not to return, and now, John Tavares is absent for Friday's skate after Habs forward Michael Pezzetta took a run at him,
making a lot of knee contact in the process.