Who would win in a 40-yard dash, Dirk Nowitzki or Peyton Manning?

Dirk Nowitzki and Peyton Manning in a 40-yard dash would be an epic TV spot and their teammates are trying to set it up.
Neither Dirk Nowitzki or Peyton Manning are known as being fleet of foot, to the point where it has turned into somewhat of a running joke with the players and their teammates. Nowitzki even took to social media late Thursday night to discuss the matter after taking some playful ribbing from his teammates.
Had this debate the other day in the locker room: Who wins a 40 yard dash between me and Peyton Manning???
— Dirk Nowitzki (@swish41) October 23, 2015
Of course, Dirk should have likely known better. As a professional athlete with a following of over 1.7 million readers on Twitter, he had to have known this would be blown out of proportion. Now, what started as an intense debate within the Dallas Mavericks locker room has transcended the NBA and thanks to said social media explosion, has created a debate across leagues and we may have a potential race in the planning.
"That would be epic! Over/under 5.7? I got Peyton by 1.5yds lol"
Lmao I got Dirk and it's not even close!!! We play in Denver twice in March! https://t.co/jrF533fEhJ
— Chandler Parsons (@ChandlerParsons) October 23, 2015
All it took was Peyton Manning’s teammate Von Miller to throw down some betting odds and Nowitzki’s back-up to stand up for him in the form of Chandler Parsons and we have a potential grudge match in the making.
It didn’t take long for someone to bill this as the fight of the century either, with the Mavericks’ team Twitter feed getting in on the action by mocking up a fight card for the epic foot race.
You heard @swish41 last night! Who would win? @Broncos’ Peyton Manning or The Big German?? pic.twitter.com/Uy2QfnpPGj
— Dallas Mavericks (@dallasmavs) October 23, 2015
All it needs now is a catchy title and we’ve got ourselves a potential pay-per-view extravanganza. Hell, if someone is willing to pay $10.00 a pop to watch Ronda Rousey dispatch of her next opponent in under a minute, surely there is some money to be made here as well.
What would you title this epic battle?