There was a whistle at the opposite end of the ice when the 23-year-old Pavelec suddenly fell over backward with no one around. His teammates rushed to his aid and immediately called for doctors and a stretcher to be brought to the ice.
Medical personnel worked over him for about 10 minutes before he was wheeled off the ice. He collapsed just 2:25 into the game..
The Thrashers said Pavelec lost consciousness when he fell to the ice and was taken to a local hospital for evaluation. The team also said that preliminary tests were negative, and that Pavelec was alert, awake and asking about the score of the game, but will be kept at the hospital overnight for observation.
Saturday, the Thrashers announced Pavelec had a concussion and a headache -- likely from the fall -- and was still in the hospital for further testing.
Pavelec, a native of Kladno, Czech Republic, became the team's top goaltender in the middle of last season, posting a 3.29 goals-against-average and .906 save percentage in 42 games, 40 of them starts.
Information from The Associated Press was used in this report.