Joseph Mark Trohman (born September 1, 1984) is an American musician. He is the co-founder, lead guitarist and backing vocalist of the rock band Fall Out Boy, as well as the lead guitarist for heavy metal supergroup the Damned Things. Fall Out Boy began in 2001 as Trohman and Pete Wentz's side project from the hardcore punk scene they were involved with, and the band has scored four number one albums on the US Billboard 200, as well as numerous platinum and multi platinum singles in the US and abroad.
