Stirling started his career at Luton as a trainee and appeared 13 times for the Hatters . He then had spells with Stevenage Borough , St Albans , Hornchurch , Dover Athletic and Tamworth . Stirling then moved to Oxford on a non-contract basis at the start of the 2005/06 season and that was when the City boss Alexander came in for the 6ft 2in defender . In January 2006 Stirling signed a deal with the Imps that will keep him at Sincil Bank until the end of the current season .