The experienced Riddell was part of Scotland's Plate-winning squad in the 2009 Rugby Sevens World Cup, has represented his country in five IRB Sevens World Series tournaments and recently captained the invitational Wailers side in the 2010 Middlesex Sevens at Twickenham.

Stephen Gemmell, Rugby Sevens coach for Team Scotland, said: "It's obviously disappointing to lose Dave [Callam] from the squad and we wish him a speedy recovery.

"Scott Riddell has been an integral part of our rugby sevens squad to date and I'm confident he can do his country proud in Delhi."

SCOTT RIDDELL (Forward)
Age: 24 (05/10/85), born in Edinburgh
Height: 185cm Weight: 97kg
Club: Blaydon and Scotland 7s
Coach: Stephen Gemmell
Occupation: RFU Community coach
Scott Riddell made his seven-a-side debut for Scotland in the Wellington (New Zealand) tournament of the IRB's 2008/2009 world series, and he followed that with four tries in the San Diego (USA) event a week later, two each against Japan and Mexico. He went on to play in the RWC Sevens in Dubai, where Scotland won the Plate competition, and he added to his seven-a-side caps with appearances in the Hong Kong and Adelaide (Australia) tournaments.
Scotland 7s record: 45 points (9 tries from 5 IRB Sevens World Series tournaments)

Rugby Sevens is one of ten core sports at the Commonwealth Games and made its debut in Kuala Lumpur in 1998, but Manchester in 2002 was the first occasion Scotland competed. Now an approved Olympic Sport, included in the 2016 Games, sevens takes on an even greater significance as part of the Commonwealth Games.