In 1999 he began playing bass guitar for Sum 41 after Richard Roy left the band. So far Cone and Deryck Whibley are the only members of Sum 41 who have appeared on all the albums who still are active in the band.
The Operation M.D.Edit
In 2006 Cone started a side project called The Operation M.D. together with Todd Morse. In 2007 they released their first album We Have an Emergency. In 2010 they released their second album Birds + Bee Stings. After this they have released a couple of singles.
- Half Hour of Power (2000)
- All Killer No Filler (2001)
- Does This Look Infected? (2002)
- Does This Look Infected Too? (2003)
- Skull Ring (2003)
- Chuck (2004)
- Go Chuck Yourself (2005)
- We Have an Emergency (2007)
- Underclass Hero (2007)
- All the Good Shit: 14 Solid Gold Hits 2000-2008 (2009)
- Birds + Bee Stings (2010)
- Screaming Bloody Murder (2011)
- 13 Voices (2016)