Guest Appearance, Vocals (2008) Stormchaser by Light This City

Vocals (2008) We Wish You a Metal Xmas...and a Headbanging New Year by Various Artists

Vocals, Producer (2008) Formation of Damnation by Testament

Vocals, Group Member, Producer, Executive Producer (2008) DDP 4 Life by Dublin Death Patrol

Vocals (2007) Heavy Metal Box [Rhino] by Various Artists

Vocals (2007) Heavy Metal [Box Set] by Various Artists

Vocals (2007) Greatest Hits by Testament

Vocals (2007) Spitfire Collection by Testament

Vocals (2006) Out for Blood by Sadus

Vocals (2005) Numbers from the Beast: An All-Star Tribute to Iron Maiden by Various Artists

Vocals, Producer (2001) First Strike Still Deadly by Testament

Vocals (2001) Very Best of Testament by Testament

Performer (2001) Metallic Assault: A Tribute to Metallica by Various Artists

Producer (2001) Frezno Smooth by Original Soundtrack

Group Member, Vocals, Producer (1999) Gathering [Bonus Track] by Testament

Vocals (1999) Feeding the Machine by James Murphy

Vocals (1998) Rising [Japan] by Stuck Mojo

Vocals (1998) Rising by Stuck Mojo

Vocals, Producer (1997) Signs of Chaos: The Best of Testament by Testament

Producer, Bass, Vocals (1997) Demonic by Testament

Author, Vocals (1997) Tribute to Judas Priest: Legends of Metal [1 CD] by Various Artists

Vocals (1996) Convergence by James Murphy

Vocals (1994) Low by Testament

Vocals (1989) Practice What You Preach by Testament

Vocals (1988) New Order by Testament

Vocals (1987) Legacy by Testament