Guillaume Lefebvre of the Rouyn-Noranda Huskies was suspended for nine games by the Quebec Major Junior Hockey league on Monday for a checking-from-behind incident last week.
Defenceman Tuukka Makela suffered a severe third-degree concussion when checked head-first into the boards by Lefebvre in a game Sept. 20.
Makela was playing in his first junior game after joining the team from the Boston Bruins' NHL pre-season camp.
He was the Bruins' third-round pick in last June's NHL draft.
The suspension takes effect immediately.