JAR Harris 7/66 v Gloucestershire at Bristol, 2007 aged 17 years and 2 days
WE Jones 5/59 v Essex at Colchester, 1929 aged 17 years and 126 days
SD Thomas 5/80 v Derbyshire at Chesterfield, 1992 aged 17 years and 206 days
KS Carlson 5/28 v Northamptonshire at Northampton, 2016 aged 18 years and 107 days
IJ Jones 5/37 v Leicestershire at Margam, 1961 aged 19 years and 222 days
GB Shaw 5/67 v Comb Services at Cardiff Arms Park, 1952 aged 20 years and 210 days