Derek George Riordan (born 16 January 1983) is a Scottish professional footballer who plays as a striker. He has been capped three times by the Scotland national team. Riordan started his career with Hibernian in 2001 and had a brief spell on loan with Cowdenbeath in 2003. He became one of the top young players in the Scottish Premier League, winning the young player of the year awards in 2005. Riordan signed for Celtic in 2006, but failed to hold down a regular first-team place and returned to Hibernian in 2008. He totalled 104 goals in 260 appearances across all competitions in his two spells at Easter Road. Riordan left Hibs as a free agent in 2011 and signed for Chinese Super League club Shaanxi Chanba, but the two-year contract was mutually terminated after just four months. He then signed for St Johnstone on a short term contract in March 2012. Riordan then signed for Bristol Rovers, but he was released after a three-month deal. He has since had short spells with Alloa Athletic, Brechin City, East Fife, York City, Edinburgh City and amateurs St Bernard's.