The Detroit Lions took a flyer on a player called the fastest man in American rugby.
Carlin Isles, who played NCAA Division II football and ran track at Ashland University in Ohio, tried out with the Lions earlier in the week and signed on Thursday as a wide receiver, the team announced.
The Lions timed Isles, a member of the U.S. rugby sevens team, at 4.22 seconds in the 40-yard dash during the workout, the Detroit Free Press reported.
"You're looking for athletes," Lions coach Jim Schwartz said. "It hasn't been unusual to see basketball players transition to the NFL, and it'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, and there are skills you can develop, and if you see something that you like, then you can work with him."
The Lions had an opening on their practice squad when tight end Dorin Dickerson was placed on injured reserve and tight end Matt Veldman was elevated to the 53-man active roster for Sunday's game against the Minnesota Vikings.