Walker attended Bartlett High School in Bartlett , Illinois and first became known in the Chicago scene in 2003 when he was just 17 years old as the replacement bass player for 504Plan . The band broke up soon after he joined , and Walker then toured with The Academy Is ... as a guitar tech and a videographer . Walker joined Panic ! at the Disco in May 2006 , replacing former bassist Brent Wilson . At the time he joined , he was 20 years old , making him the oldest band member . Walker was with Panic ! at the Disco when they won the video of the year award at the 2006 MTV Video Music Awards for their song " I Write Sins Not Tragedies " , although he had not recorded the song with the band nor did he appear in the video . He co-wrote and released one studio album with the band , '' Pretty . Odd . '' , and one live album , '' ... Live in Chicago '' . In July 2009 , he and fellow band member Ryan Ross left Panic ! at the Disco , citing creative differences , and formed another band , The Young Veins . The Young Veins completed two tours in 2010 , one with Foxy Shazam and one with Rooney . On December 10 , 2010 , Walker announced via Twitter that The Young Veins would be on hiatus , later noting in interviews that the creative and personal differences of the past carried over to the new project
2006 MTV Video Music Awards
2006 MTV Video Music Awards
Jon Walker