Guy Fieri on the sidelines of the Oakland Raiders opening game, gives Jon Gruden a firm handshake

Guy Fieri has just opened a new restaurant at Levi's Stadium in San Francisco, but he was carrying money and black Monday night on the sidelines of the Oakland Raiders' opener against the Broncos from Denver to the Coliseum.

Raiders head coach Jon Gruden approached the mayor of Flavortown just before Gruden took the field, and they shook hands and hugged him.

But when Gruden let go of Fieri's hand, Fieri brought him back inside, to Donald Trump, to try to show his dominance to world leaders.

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Fieri does not come from the San Francisco Bay Area, but he has lived in the area for a while. He and his family live in Santa Rosa.

It's not really a surprise that he supports the Raiders in their attack against the Broncos. He has played in HBO's "Hard Knocks" series over the last season and is apparently a friend of the Raiders offensive lineman, Richie Incognito.

FIERI FRIENDSHIP: Apparently, Guy Fieri and Richie Incognito are friends.

In addition, last month he posted a photo of himself on Twitter, his face being composed on the body of a Raiders coach. "Hey @raiders – do you want to spice things up for #HardKnocks this year – I'm available if you need to look for a flavor coordinator," he subtitled.

Let's see how much taste he brings to the pitch tonight as the Raiders face off against their rival AFC West.

Drew Costley is a SFGATE editorial assistant. E-mail: [email protected] | Twitter: @drewcostley