Tarleggia was a Starfleet proctor at Starfleet Academy. At some point before the year 2372, Tarleggia started the Academy Marathon on Danula II.
In 2372, Nikolas Kyprios recreated the race on the holodeck, including Tarleggia. Tarleggia had taught Kyprios quantum mechanics and was a small muscular man. (DS9 novel: Saratoga)