Larkin has been playing drums since the age of ten.

He formed Wrathchild America in 1978, recording two albums for Atlantic Records before being dropped by the label.
The group disbanded and later reformed as Souls at Zero,  signing with Energy Records and releasing an eponymous debut album that was well received by critics.
He went on to record two albums with Ugly Kid Joe and two more with Amen.

He joined Godsmack in 2003, replacing departing drummer Tommy Stewart.
He has since appeared on their albums  Faceless, IV, The Other Side, The Oracle, 1000hp, When Legends Rise.

His numerous side projects have included hardcore punk and thrash metal band Kiddie Porn with fellow Wrathchild guitarist Jay Abbene and bassist John "Tumor" Fahnestock, MF Pitbulls with members of Snot, and The Apocalypse Blues Revival with Tony Rombola.

He has appeared as a session musician on such albums as Strait Up by Snot and Glenn Tipton's Baptizm of Fire.
He has played for Vanilla Ice, Glassjaw, and Stone Sour.

He was featured on the Behind the Player series.
Larkin has been playing drums since the age of ten.
He formed Wrathchild America in 1978, recording two albums for Atlantic Records before being dropped by the label. The group disbanded and later reformed as Souls at Zero,  signing with Energy Records and releasing an eponymous debut album that was well received by critics. He went on to record two albums with Ugly Kid Joe and two more with Amen.
He joined Godsmack in 2003, replacing departing drummer Tommy Stewart. He has since appeared on their albums  Faceless, IV, The Other Side, The Oracle, 1000hp, When Legends Rise.
His numerous side projects have included hardcore punk and thrash metal band Kiddie Porn with fellow Wrathchild guitarist Jay Abbene and bassist John "Tumor" Fahnestock, MF Pitbulls with members of Snot, and The Apocalypse Blues Revival with Tony Rombola. 
He has appeared as a session musician on such albums as Strait Up by Snot and Glenn Tipton's Baptizm of Fire. He has played for Vanilla Ice, Glassjaw, and Stone Sour. 
He was featured on the Behind the Player series.
Shannon Larkin