We tackle the varying accounts of the story of how Olaf One-Eye rode the dragon Numinex back to Whiterun, imprisoning it deep within the keep (which would henceforth be known as Dragonsreach). Some say he was a great hero the likes of which will never be seen again, others say he was a treacherous liar. Decide for yourself after listening to our newest episode!
ELDER LORE 
Dragons dont age, so Numinex had to have been valiantly fought by Olaf. Plus you see Olaf in Sovngarde, so..