Isles, a former track sprinter who has run the 100m in 10.24 seconds, has signed with Gregor Townsend’s side until the end of the 2014-15 season. Isles has played in 14 tournaments for the USA’s seven-a-side team, scoring 27 tries. SEE ALSO: • Townsend’s inventive side shown in Isles signing • Iain Morrison: Isles signing wrong for Glasgow