From the 15th row behind the goalposts, a young boy stands and flexes his muscles. A game day giveaway Lucha Libre mask covers his face and a Bo Nix jersey hangs loosely over his shoulders. Several seats over, a rectangular navy blue banner shimmers in the afternoon sunlight above Section 133, “You’re In Broncos Country,” it screams. Full-throttle cheers, a head coach yelling at an opponent, home-field dominance — this is what the beginning of a new era looks like. Fans, including a mini Barrel Man, cheer on the Broncos during the first quarter at Empower Field at Mile High in Denver on Sunday, Oct.