Death Eater
Ludovic "Ludo" Bagman is a retired professional Quidditch player, formerly a highly successful Beater for the Wimbourne Wasps and England's international team, whose good looks have gone a bit to seed; his nose is squashed in (apparently having been broken by a stray Bludger) and he is quite a bit thicker around the middle than he was in his Quidditch days. He was the head of the Department of Magical Games and Sports. Rowling uses Dumbledore's Pensieve to reveal in "Harry Potter and the Goblet of Fire" that Bagman was accused of being a Death Eater about thirteen years before the events of the fourth book because he had given information to recently discovered Death Eater Augustus Rookwood. It is stated that he had believed Rookwood, who was his father's friend, to be beyond suspicion, and that, consequently, he had thought that he was aiding the Ministry by passing the information on to him.