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
Talha Jubair of Bangladesh is the youngest player (17yrs. 07d) to play at the World Cup in 2002/2003
Talha Zubair (Bangldesh)
Hasan Raza of Pakistan was 14 years old when he played his first international cricket match.
The only player to play both cricket and football world cups is Sir Vivian Isaac Richards.
James O'Connor from Australia who kicked 5 penalties in their first match so hes the youngest rugby player to play in the world cup.