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One day after declaring his team the "winner of the offseason," Bills coach Rex Ryan went out did what anyone else who just won the offseason would do: He took a tandem bike ride through a local park with his brother.

Seriously. This actually happened.

Rex and Rob Ryan were at a park in Buffalo on Friday riding a tandem bike together. I know what you're thinking, "pics or didn't happen," so here's the proof that the Ryan brothers are skilled tandem bikers.

Maybe the Ryans should move to Philadelphia because that's some serious brotherly love.

ESPN has more details about the photo:

Jonah Bronstein, a Buffalo-area sportswriter, shared the photo from a friend's Facebook page. It's unclear when the image was taken, but it appears to have been snapped in Buffalo's Delaware Park, adjacent to Route 198.

"Obviously, look, we enjoy each other's company," Rob Ryan said Thursday. "We are each other's best friend."

Honestly, I wouldn't be surprised at all to find out that Rex only hired Rob as a Bills assistant coach so that he'd have someone to ride a tandem bike with during the offseason.

Anyway, that bike must be made of titanium to hold be able to hold up the Ryans, because they aren't small guys.

Several Twitters users felt that maybe the Ryans should have rented something a little bigger.

We're only one day into the NFL offseason and it's already off to a blistering start.