He made his league debut against Chelsea on 20 September 1970 .
Alderson , who was born in Dundee , began his career with local youth side Lochee Harp before becoming a professional with Coventry City .
Alderson made Alderson 's league debut against Chelsea on 20 September 1970 .
Alderson , who was born in Dundee , began his career with local youth side Lochee Harp before becoming a professional with Coventry City .