Director Mario Diaz (The Clemente Effect) forwarded the below short documentary he directed for ESPN’s Grantland, on Carlin Isles, the American rugby sevens player from who currently plays for the United States National Team, and is considered the fastest rugby player in the world!
 

He runs a 4.2 40-yard dash.

You can read Grantland’s full profile of Isles HERE. 

And then watch the short documentary on him below: