Originally from Rhodes, but Paus. 6.7.4 attests Dorieus was also proclaimed 'as from Thurii' since he fled there from Rhodes from political enemies. Also mentioned in Syll.3 82 = IAG 23. I generally follow Farrington (2012), no. 1.56 and p. 118 notes 273-4. Dorieus' victories can be reasonably safely dated: he won 3 Olympic, 4 Pythian, 8 Isthmian, 7 Nemean victories, and following IAG 23 also 4 times in the Panathenaea, 4 times in the Asclepiaea, 3 times in the Hecatomboia and 3 times in the Lycaea. Dorieus was a pankratiatist. - PK
Dorieus was the youngest son of Diagoras, and brother of Akysilaos and Damagetos (all three also in database). He won three successive Olympic victories in pankration (Paus. 6.7.1). Thucydides (3.8) gives the date of his second victory as 428 BC (88th Olympiad); hence, his other victories were at the 87th Olympiad (= 432 BC) and the 89th Olympiad (=424 BC).
He also won 8 Isthmian victories, 7 Nemean victories and a Pythian one. If he is the victor in Syll.(3), 82, he actually won 4 times at the Pythia and also 4 times at the Panathenaia, four times at Asklepieia, three times at Hekatombaia and three times at Lykaia.
He had fled from Rhodes, and therefore was announced as from Thurii. Later, he returned to Rhodes and fought with Sparta against Athens with his own ships. He was taken prisoner and brought alive to Athens (Paus. 6.7.4). - DL