Are  Jeff Mangum and Zack de la Rocha in the same industry?
Jeff Mangum Jeff Mangum (born October 24, 1970) is an American singer, songwriter, and multi-instrumentalist, best known for his work as the lyricist, vocalist and guitarist of the band Neutral Milk Hotel, as well as being one of the cofounders of The Elephant 6 Recording Company. He is best known for his complex, lyrically dense songwriting, apparent on the critically lauded album "In the Aeroplane Over the Sea".
Jeff Cowan Jeff Cowan (born September 27, 1976) is a Canadian former professional ice hockey player. Cowan was a left winger and played 434 games in the National Hockey League (NHL).