The Pittsburgh Penguins will have to make do without Evgeni Malkin for the time being after placing their injured star on injured reserve retroactive to last Friday.
Head coach Dan Bylsma had already confirmed on Sunday that the team would without Malkin for their three-game road trip this week.
Malkin was hurt on Friday night after sliding into the boards and appearing to hit the back of his head after he was checked by Florida's Erik Gudbranson.
Malkin missed Pittsburgh's 5-3 win over the Tampa Bay Lightning on Sunday.
According to the Pittsburgh Post-Gazette, Bylsma said that Malkin has some short-term memory loss after the hit, but the symptom has improved. The coach also said that Malkin did not experience headaches or disorientation.
Penguins captain Sidney Crosby, who has battled through concussions himself in recent seasons, said he spoke to Malkin over the weekend.
"I just asked him how he's doing," Crosby told the Post-Gazette. "I'd probably give him a headache if I started trying to explain all the stuff I went through.
"I think that as a teammate, as a friend, I just ask him how he's feeling. It's too early for telling him my life story. I think it's just more or less being there for him.
"We'll see. From what I heard, he's feeling better [Sunday], so that's good."
Malkin has four goals and 17 assists in 18 games for the Penguins this year. He won the Art Ross and Hart Trophies last season.