It's just a friendly wager, a friendly wager that most of us could never afford.

FOX's Chris Hoenig reports:

Sometimes Mayors make a bet over a championship series, usually food items representative of their city. But what do well-paid NFL wide receivers wager?

Steelers wideout Antonio Brown has been rolling into camp in a brand new, custom-painted Rolls Royce, giving Jets receiver Brandon Marshall an idea for a bet, which he posted on Instagram:

(Marshall) "If you have more receiving yards than me, I'll give you the Porsche. If I have more receiving yards than you, you've got to give me the Rolls Royce."

That's right... Porsche versus a Rolls Royce... Brown was second in receiving yards last year, Marshall fourth, but more than 300 yards back. Brown telling TMZ he is willing to take the bet.

Chris Hoenig, FOX News.

Follow Chris Hoenig on Twitter: @Chris_Hoenig

First rule in getting better is showing up #callgod #Boomin

A photo posted by Antonio Brown (@ab) on

@ab I've never seen you back down from a challenge. #race4pinks

A video posted by Due Season.. . (@bmarshall) on