Brandon Marshall bets his Porsche in Antonio Brown challenge

Brandon Marshall enjoyed a stellar campaign with the New York Jets in 2015, setting franchise records for receiving yards (1,502) and receptions (109) in a season.

Those numbers weren't as good as the ones Antonio Brown put up, but Marshall is confident he'll be better than the Pittsburgh Steelers wide receiver this upcoming season.

On Wednesday, he challenged Brown via Instagram: If Marshall has more yards than Brown, he'll get Brown's Rolls Royce, and if Brown has more yards, Marshall will give him his Porsche.

Brown told TMZ Sports he's willing to accept Marshall's challenge, but expressed skepticism about the validity of it.

"He don't really wanna do that," Brown said. "He just wants some PR. He too old to be doing that."

Brown also noted that it wouldn't be a fair trade.

"The RR is about $100K up (from the value of the Porsche)," he said. "If he really serious, call me, I'll gladly accept. Don't Internet it."