He began his career at Home Farm F.C. in 1993 making his debut on the 19th of September. After five years at Whitehall Kelly moved to Shelbourne F.C. in 1998.
Moved to St Patrick's Athletic in December 1999.
Signed for Shamrock Rovers F.C. in March 2003 and made his debut in the first game of the season.
Scored his only goal in his second appearance.
Made 18 total appearances in his two seasons in the Hoops including 1 appearance in the UEFA Intertoto Cup.
Before transferring to Longford soon after.
His brother Garrett played for Rovers in the mid-1990s.
Kelly will manage the PFAI team that will take part in the FIFPro Scandinavian Tournament in Oslo, Norway on Friday 14 January 2011 [http://www.shamrockrovers.ie/reports/vucd210403.htm.