Fans filmed several brutal fights in the stands: one of them involved a 49ers fan beating up another 49ers fan.
Santa Clara Police say they made several arrests, mainly for public intoxication, but some were for assault.
During the national anthem, a 49er cheerleader took a knee. It's believed she's the first cheerleader to protest this way. The cheerleader has not been identified.
Former 49ers quarterback Colin Kaepernick was the first to take a knee during the anthem back in 2016 to protest police brutality.
As for the actual game, the Niners smoked the Raiders 34-3, third-string quarterback Nick Mullens dominated his NFL debut.
This is the last Battle of the Bay ever, as the Raiders are set to move to Las Vegas next year.
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