What is the fine-grained topic of the following text: His career, managed by his father, Eugene "Pop" Coulon, stretched from 1905 to 1920, during which time he claimed to have fought over three hundred pro fights (losing only four) notwithstanding the official statistics which read 96 pro bouts, 24 by KO, 32 by decision, and four draws. Only return the topic.
Pro boxing career of Eugene "Pop" Coulon's son