USA rugby superstar Carlin Isles is often called the fastest man in rugby - and he's taken his talents to the NFL.
Because according to the Detroit Free Press, the Lions have signed Isles to their practice squad after he ran a 4.22 40-yard-dash time in a work-out.
That means he's faster than Tennessee Titans running back speedster Chris Johnson - he reportedly ran a 4.24 at the NFL combine back in 2008.
Lions coach Jim Schwartz told the Detroit Free Press earlier this week: "Indianapolis has a rugby guy as a pass rusher [Daniel Adongo] and I know San Fran brought a guy in [Lawrence Okoye] that was a shot-putter or a discus guy.
"I mean, you're looking for athletes. It hasn't been unusual to see basketball players transition to the NFL.
"That's not just recently, that goes way back. Even track guys like Bob Hayes and Renaldo Nehemiah, things like that.
"An athlete's an athlete. There's skills that you can develop, and if you see something you like then you can work with him."
Formerly an USA Olympic team hopeful, Isles put his track dreams to one side to play rugby - and became a YouTube sensation.
The clips of him - including the one above - show Isles competing in Rugby Sevens, a small-sided variation on Rugby Union that allows speed guys like Isles to show off their pace.
And what pace. Isles is an absolute speed demon. Could he be on an NFL sideline next year?
Check out Isles in action in the clip above...