'Inside the stadium, Kaepernick took the field to plenty of fanfare. The 49ers fans in attendance got inside the stadium early and took pictures with the quarterback. He got the usual boos with the rest of his teammates when the 49ers were introduced closer to kickoff. As the teams got ready for the national anthem, Bills fans booed the quarterback one more time and started a "U-S-A" chant. Some in the stands attempted to sing along with the anthem, but the scene was tame otherwise. Just another game day.'