Here's the incipit of a piece at East Side Boxing, apparently continuing a series on ancient boxing:

By M.C. Southorn: Among the greatest of the Ancient Olympic boxers – indeed one of the greatest Olympic athletes –was Theagenes of Thasos. A boxer, pankratist (no-holds barred fighting) and runner, Theagenes captured the boxing title at the 75th Olympiad in 480 BC, and, four years later, he won the Pankration (no-holds-barred) title. Like all Olympic champions, Theagenes’ victories offered him immortality, and mythology was soon to follow..

His first athletic feat is said to have come at the age of 9, when he single-handedly stole a bronze statue by tearing it from its base. Once caught, he dutifully returned the statue, and was steered towards athletics by his village elders. His first love was sprinting; of his speed, Pausanias wrote:

“His ambition was, I think, to rival Achilles by winning a prize for running in the fatherland of the swiftest of those who are called heroes. The total number of crowns that he won was one thousand four hundred.”

(It is interesting to note that Pausanias numbers Theagenes’ races won as 1400, but Ariston claims 1400 is the number of his Pankration wins, while the inscription at the shrine of Thasos at Delphi describes him as being mainly known for boxing and puts his “total victories” at 1300).

At any rate, by the time he reached his first Olympic games, Theagenes was an accomplished Pankratist, but, after an argument with the reigning Olympic boxing Champion, Euthymos, (another great, and future three-time champion) he elected to enter that event as well. This was deemed by the judges to be arrogant and unsportsmanlike and Theagenes was fined but allowed to compete and ultimately win. Unfortunately, the brash young fighter from Thasos was too spent from the boxing to compete in the Pankration, and he retired from the games. Euthymos must have been a tough opponent, for at the following games in 476 decided to stick to Pankration only, thereby allowing Euthymos to become the first former boxing Champion in history to regain his Title. Euthymos went on to win a third Olympic boxing title in 472 BC, cementing his own place as one of history’s greatest boxers.

Following his death, the people of Thasos erected a statue to Theagenes. A long-time rival of the old fighter, who had never defeated him in life, made a nightly practice of wrestling the statue, until one night the statue fell on the old challenger, killing him. The statue was tried and found guilty of murder (in accordance with local custom), and it was summarily dumped in the sea. Naturally, in the mythological tradition, famine immediately beset the land, and it wasn’t until the statue was replaced that the troubles were ended. Therafter, Theagenes was worshipped as a demi-god of fertility.

Here follows the career record of Theagenes, according to the inscription at the shrine of Thasos at Delphi:

Olympic Games: 2 victories (1 boxing, 1 pankration)
Pythian Games: 3 boxing
Isthmian Games: 9 boxing, 1 pankration
Nemean Games: 9 boxing
1300 total victories
Unbeaten at boxing for 22 years

... more