Oakland authorities had vowed to prevent a repeat of violence that occurred last week after the Raiders advanced to the championship game, and large squads of officers moved quickly to disperse crowds.
Witnesses said police used tear gas to move the crowds. Police officials could not immediately be reached for comment.
Authorities also kept traffic out of the city's historic Jack London Square, near downtown, and fans mostly heeded official warnings and stayed away from the area.
At Barclay's, a half-full bar in the square, Raider fans watched their team lose in a rout, but declared they were still devoted to the silver and black.
"I kept my faith until the very end," said Karen Wilson of Oakland. "And I think most Raiders fans really did."
Some shop owners in the area of last week's violence closed at kickoff time in hopes of avoiding trouble.
At Q's Clothing, Nader Qutov, the owner's nephew, said he was closing early, although before the game he also hawked Raiders t-shirts to eager fans.
Many of the Raider faithful flocked to watch the game at Ricky's Sports Theater and Grill, where more than 80 televisions show every Raider game and diehard fans can comb through the gift shop for Raider keepsakes.
"I drove an hour and a half just to be with my family," said a Raider fan who insists on going by the name of Gorilla Rilla. "We are a Raider family."
For the team's first trip to the Super Bowl in almost two decades, Ricky's owner brought in a 20-foot, high-definition television and added a $25 cover charge.
Some fans made sure they arrived in time. Dennis Giovanetti said he showed up at Ricky's at 7 a.m. to make sure he could get a prime seat.
"My breakfast was reading the paper," he said. "I couldn't be here early enough."
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