9. Colin Cowdery
Former English cricketer Colin Cowdery scored an unbeaten 51-run on his 24th birthday, 24th December 1956. It was the Johannesburg Test match between South Africa and England where Colin Cowdery scored 59 runs in the first innings of that match. His knock helped England to manage a good first innings total and later, England won that match by 131 runs.
Later, Colin Cowdery played a special innings on his 30th birthday. During the four-day practice match against South Australia at Adelaide in December 1962, MCC batsman Cowdery completed his triple-century on his birthday (24th December 1962). While he was not out on 244 runs on the day one of that match (22nd December), he scored 307 runs on the day two of that match.