Nitish Kumar of Canada at the age of 16.
Sachin Tendulkar. He made his debut when he was 16 years and 205 days. Next to him is Piyush Chawla.
Theo Walcott made his international debut on May 30, 2006, becoming the youngest England international at the age of 17 years, 75 days.
Bep Guidolin was the youngest player ever. He was 16 when he made his debut for Boston in 1942-43
Hasan Raza from Pakistan, who made his debut against Zimbabwe when he was only 14 years and 227 days in a test match in Pakistan.
17 years and 112 days
He made his ODI debut on 2 October 1996