'Fastest man in rugby' eyes Olympic track

American rugby player Carlin Isles has launched an ambitious bid to represent the United States in two sports at a single Olympic Games after deciding to resurrect his sprinting career.

Isles - hailed as 'the fastest man in rugby' - took up the seven-a-side version of the sport in 2012 after failing to make the US Olympic team for the London Games.

The 26-year-old winger's personal best for the 100m - a wind-assisted 10.12 seconds - would have been good enough for a semifinal place in the London Games.