Clarence Whistler was born in Delphi, Indiana. His parents were C. C. Whistler and Leah Catharine Snyder and he was the oldest of eight children.

Australian Heavyweight Championship - Clarence Whistler defeats “Professor” William Miller at the Theatre Royal on Bourke Street in Melbourne, Australia to become the Australian Heavyweight Champion.

Clarence Whistler died of Pneumonia at the age of 29 in Melbourne, Australia. Sources referring to the nature of his early death are conflicting. Some suggest that the illness was caused by excess alcohol consumption during celebration. Other sources purport that Whistler's condition was complicated by him either biting the tops off champagne bottles for sidebets or eating a whole champagne glass. Whistler was buried in Melbourne General Cemetery with "Professor" William Miller as one of his pallbearers. He was memorialized by fellow athletes, including William Muldoon, and the sports world at large as the most courageous athlete of his time.

Australian Heavyweight Championship - The Australian Heavyweight Championship is vacataed after the death of Clarence Whistler.