Butt fumbler who?

Butt fumbler who? This past weekend, the Denver Broncos' new (starting?) quarterback, Mark Sanchez, went ahead and proved that he's just a normal guy trying to have some fun in life when he got caught bringing a cane flask into the Kentucky Derby. 

As TMZ reports (snitches?), Sanchez busted out the sneaky device with "a quick twist of the top (and) revealed a secret glass tube hidden inside the cane — which the 29-year-old proudly showed off to his crew."

One nearby looky-lou was so jaw-dropped that she told our new best friend to just "Shut the fuck up!"

Starter material, we can feel it …

// Cover Photo: Getty Images — Body Photo: TMZ, Sporting News