Brock Purdy's sideline shout at Kyle Shanahan went viral, but the San Francisco 49ers coach says a helmet communication cutoff was the real issue.
https://www.foxnews.com/outkick-sports/49ers-coach-kyle-shanahan-explains-viral-sideline-exchange-brock-purdy-yelled-during-game
https://www.foxnews.com/outkick-sports/49ers-coach-kyle-shanahan-explains-viral-sideline-exchange-brock-purdy-yelled-during-game