A man who collapsed during the San Francisco 49ers' debut game at Levi's Stadium has died.
The Santa Clara Fire Department said stadium staff responded to a cardiac emergency during the third quarter of the 49ers' preseason opener against the Denver Broncos on Sunday.
The man received CPR and was rushed to a hospital, where he was pronounced dead. His name has not been released.
The 49ers issued a statement Sunday night offering condolences to his family and friends.
The team's 34-0 loss to the Broncos and 80-degree heat drove thousands of fans to leave the new stadium midway through the game.
Team officials say there was an unusually high number of calls for emergency services, likely because of the heat.