The Dallas Cowboys - long known as "America's Team" - travel well and Sunday was no exception: Levi's Stadium was awash in blue and it often sounded like the visitors were playing in Arlington, Texas, after their big plays.
"I couldn't believe it," San Francisco 49ers outside linebacker Ahmad Brooks said. "I was like 'There's more Dallas Cowboys fans than there are 49ers fans.'"
After the 49ers' third straight loss, left tackle Joe Staley suggested the pro-Dallas crowd was the home team's fault.
"We're sitting 1-3 right now," Staley said, "so we have to do our job to make sure our fans come out for us.