Sum 41 had ten official members between 1996 and 2025. The final line-up was Deryck Whibley, Dave “Brownsound” Baksh, Jason “Cone” McCaslin, Tom Thacker and Frank Zummo. The Canadian band from Ajax, Ontario, stopped performing in 2025.
Whibley was the only member there from start to finish. The band signed with Island Records in 1999 and broke through with All Killer No Filler (2001), whose single “Fat Lip” reached number one on the Billboard Modern Rock Tracks chart.
Deryck Whibley – Lead Vocals and Rhythm Guitar (1996–2025)
Deryck Whibley sang lead and played rhythm guitar from 1997 until the end, and added keyboards from 2004. In the band’s first year he played lead guitar and sang backing vocals, and he played lead guitar again from 2006 to 2009 after Baksh left. He also played occasional drums between 2001 and 2013.
Dave “Brownsound” Baksh – Lead Guitar (1997–2006, 2015–2025)
Dave Baksh played lead guitar, sang backing vocals and sometimes shared lead vocals. He left in 2006 and returned in 2015, staying in the band until it ended.
Jason “Cone” McCaslin – Bass (1999–2025)
Jason McCaslin joined on bass and backing vocals in 1999 and stayed for the rest of the band’s run. He was the band’s longest-serving bassist.
Tom Thacker – Guitar and Keyboards (2009–2025)
Tom Thacker toured with Sum 41 from 2007 and became a member in 2009, playing lead guitar and singing backing and occasional lead vocals. He moved to rhythm guitar as well in 2015, when Baksh returned, and added keyboards from 2016.
Frank Zummo – Drums (2015–2025)
Frank Zummo played drums and sang backing vocals from 2015 until the band’s end, following the departure of Steve Jocz.
Former Members
- Steve “Stevo32” Jocz: drums, backing and occasional lead vocals (1996–2013). He was a founding member.
- Jon Marshall: lead vocals and rhythm guitar (1996–1997), bass (1996).
- Grant McVittie: bass and backing vocals (1996).
- Richard “Twitch” Roy: bass and backing vocals (1996–1998).
- Mark Spicoluk: bass and backing vocals (1998–1999), just before McCaslin joined.
Touring Musicians
Matt Whibley played keyboards on tour in 2011, and Darrin Pfeiffer filled in on drums in 2015.
Frequently Asked Questions
- Who was in Sum 41’s final line-up? Deryck Whibley, Dave Baksh, Jason McCaslin, Tom Thacker and Frank Zummo.
- Who was Sum 41’s original drummer? Steve Jocz, from 1996 to 2013.
- How many bassists did Sum 41 have? Four: Grant McVittie, Richard Roy, Mark Spicoluk and Jason McCaslin. Jon Marshall also played bass briefly in 1996.
- Is Sum 41 still together? No. The band’s active years run from 1996 to 2025.
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