Bruins forward Patrice Bergeron, who missed most of last season with a concussion, left Saturday's game against Carolina in the second period after a collision with the Hurricanes' Dennis Seidenberg.
Bergeron went down face-first on the ice after finishing a check on Seidenberg as he was dumping the puck into the Boston zone. Bergeron was down and attended to for several minutes before looking wobbly when he got to his skates and was helped to the locker room.
The injury appeared to be to Bergeron's head or neck.
"The doctors have been looking at it. They haven't given us any indication as far as the severity of it," Bruins coach Claude Julien said after his team finished off a 4-2 victory over the Hurricanes.
"Obviously, he went down a little dazed. We're not able to give you a verdict. That's all I can tell you about that situation."
Asked if he thought Bergeron sustained another concussion, the coach said, "They haven't told me. We've asked and they haven't diagnosed it yet."
Julien said he spoke to Bergeron after the second period and added the player was alert.
"He got dinged pretty good," Julien said. "He was speaking to me and then I took off and coached the third period."
Bergeron's 2007-08 season ended after 10 games. He was hit from behind into the boards by Philadelphia's Randy Jones on Oct. 27, 2007, and missed the rest of the regular season and the playoffs with a concussion and accompanying problems.
"If any of your teammates are lying on the ground like that, all you're thinking is I hope he's alright. When he got up and skated off on his own two feet, it was good to see." -- Stephane Yelle
He was close to returning in the postseason, but the Bruins were eliminated in seven games in the first round of the playoffs by the Montreal Canadiens.
Bergeron returned for training camp and had played in 30 of Boston's first 31 games before Saturday. He was playing well but was having trouble regaining his old scoring touch, scoring just four goals, one in his last 18 games before Saturday.
Bergeron's teammates clearly showed their concern after the game.
"Obviously, maybe a little more so because it's Bergy, but if any of your teammates are lying on the ground like that, all you're thinking is 'I hope he's alright,"' said Stephane Yelle. "When he got up and skated off on his own two feet, it was good to see."
Added goalie Manny Fernandez: "We know what's at stake and our prayers are with him, that's for sure. We hate to see a guy like that go down again."