On your marks. Get set. Race!
Let's take a closer look... via his signature (sans autograph), Diggs made a proclamation to Goodwin:
"We can race anytime!" said Diggs.
When Diggs (2015) and Goodwin (2013) entered the NFL Draft, they ran their 40-yard dash in 4.46 seconds and 4.27 seconds, respectively.
One more note, Goodwin is an Olympian - participating in the long jump in the 2012 London Olympics. I'm sure Diggs would love to say he beat an Olympian in a 40-yard dash.
It seems like that 40-yard race would be as close as the Mayweather vs. McGregor boxing match.