He was trained by Bobby Rimmer in Manchester for his first eleven professional fights, winning eight on points and two by knockout.
He then teamed up with Irish trainer John Breen where he engaged in another four paid contests including a lightweight Central Area title bout where he defeated previously unbeaten Joe Elfidh (7-0) by way of knockout in the fifth round.
Farrell was forced to retire from boxing in January 2013 after suffering brain damage during his fight with Anthony Crolla.
Farrell was awarded a BEM British empire medal by her majesty in the Queen's 90th birthday honours 2016.
[citation needed] Kieran Farrell BEM is now a BBBOFC Professional Promotor, Manager and Trainer.