Sachin Tendulkar is the first and till now the only player to score a double century in ODI Cricket.
Shahid Afridi entered cricket when he was 16
Indian Cricket Player-Sachin Tendulkar who scored double century for his team-India
Talha Jubair (Bangladesh) is the youngest player to play world cup cricket match. He was 17 years and 70 days in 2003 Cricket World Cup to play for Bangladesh