The league said Monday there was no conclusive evidence that Grabovski bit Canadiens forward Max Pacioretty.
Pacioretty said he got a precautionary tetanus shot after the incident in Toronto's 6-0 victory. The forward emerged from the skirmish showing his arm to the officials and claiming that Grabovski bit him.
During the third-period melee, Pacioretty wrapped an arm around Grabovski's face from behind.
Grabovski received a 10-minute misconduct and a roughing minor after the scuffle. Pacioretty was also issued a 10-minute misconduct.