Youngest county cricketer ever

15 years and 27 days ... and totally polished already. To put this into context, Sachin was 16 when he made his debut.

http://www.telegraph.co.uk/sport/cricket/counties/8478831/Barney-Gibson-makes-history-at-just-15-as-Englands-youngest-ever-county-cricketer.html

At the age of just 15 years and 27 days, the Leeds-born Gibson strode out to keep wicket for Yorkshire against Durham MCCU at the picturesque Racecourse ground. He became the youngest county cricketer, surpassing a record set by Charles Young, who was 15 years and 131 days old when he played for Hampshire against Kent at Gravesend in 1867.