Kenny began his professional football career with Chelsea signing from Wycombe Wanderers in 1973, his most successful period with Chelsea was 1976-77 when his strike partnership with Steve Finnieston helped Eddie McCreadies' young side win promotion back to the First Division. He joined Aston Villa in 1978 switching to left back, with Villa he won the League Championship 1980/81 and European Cup 1981/82. He left Villa in 1983 for Nottingham Forest then had spells with Portsmouth, West Bromwich and Crew Alexandra, in 1993 moving into management with stints at Grimsby and Wigan Athletic.
2004 to date Kenny has been the England Under 16s Coach and an Assistant Coach for the England under 17 football team.
His Autobiography " A Game of Three Halves" published by Pitch Publishing is available from August 1st 2013 from Amazon.