Complex sentence: Kroton spawned many victors during the ancient Olympics and other Panhellenic Games with the most famous being Milo of Croton, who won six wrestling events in six Olympics in a row and Astylos of Croton, who won three running events in three Olympics in a row.
Split into simpler sentences: Kroton spawned many victors during the ancient Olympics and other Panhellenic Games. The most famous ones were Milo of Croton, who won six wrestling events in six Olympics in a row and Astylos of Croton, who won three running events in three Olympics in a row.