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Thành viên hiện tại:
*Chuck "Evil Chuck" Schuldiner (Charles Michael Schuldiner) - Vocals, Guitar
(R.I.P. - December 13th, 2001, pneumonia - brain stem cancer) (Control Denied, Slaughter (Can), guest on Voodoocult, Mantas (US), ex-Naphobia (Guest))
*Shannon Hamm - Guitar (Control Denied, Talonzfury, Beyond Unknown, Metalstorm)
*Scott Clendenin - Bass (ex-Control Denied, Talonzfury)
*Richard Christy - Drums (Burning Inside, Rick Renstrom, ex-Acheron (US), ex-Control Denied, ex-Demons & Wizards, ex-Iced Earth, ex-Leash Law, ex-Public Assassin, ex-Tiwanaku, ex-Syzygy (US), ex-Bung Dizeez, guest for Crotchduster, Incantation, Monument of Bones)
Thành viên trước đây:
Vocals:
Louie Carrisalez (Spiritual Healing Tour)(ex-Necrovore, ex-Rotting Corpse (US),ex-Devastation)

Guitar:
Rick Rozz (1983-85, 87-89) (Massacre (US), ex-Thatcher, ex-Mantas (US))
Matt Olivio (1985) (Repulsion, ex-Dejecta)
John Hand (1986 (he never played on any album or live))
James Murphy (1990): (Disincarnate, Agent Steel, Obituary, Cancer, Testament, Konkhra, Explorers Club, guest for Crotchduster)
Walter Trachsler (Spiritual Healing tour) (Rotting Corpse)
Albert Gonzalez (ex-Evildead, ex-Rise) (Spiritual Healing tour)
Paul Masvidal (1990-92) (Cynic (US), ex-Master (US), Gordian Knot, Portal (US))
Andy LaRocque (1993) (King Diamond, Illwill, X-World/5, E.F. Band + Gutrix as guest)
Craig Locicero (1993 - on Individual Thought Patterns tour ) (Forbidden (US))
Ralph Santolla (1993) (Obituary, Millenium (US, Sebastian Bach & Friends, Eyewitness, Iced Earth, ex-Deicide)
Bobby Koelble (1995)

Bass:
Scott Carlson (1985) (Repulsion/Genocide (US), Death Breath (Live Guest))
Eric (1985)
Terry Butler (1987-90) (Massacre (US), Six Feet Under, Denial Fiend)
Steve DiGiorgio (1986, 91, 93) (Sadus, Freak Neil Inc., Funeral (US), ex-Dragonlord, Sebastian Bach & Friends, Artension, Suicide Shift, Vintersorg, ex-Iced Earth, ex-James Murphy, ex-Control Denied, ex-Autopsy, Quo Vadis (Can), Testament, Scariot)
Scott Carino (1991-1992) (Lowbrow, ex-Fester (US))
Kelly Conlon (1995) (Monstrosity (US), Vital Remains, Infinity Minus One, Fires Of Babylon,Pessimist (US))

Drums:
Kam Lee (1983-85) (vocals on occasion) (Massacre (US), Abhorred Existence, ex-Mantas (US), Denial Fiend, HatePlow)
Eric Brecht (1985) (ex-D.R.I., ex-Hirax, Attitude Adjustment , Two-Bit Thief)
Chris Reifert (1986-87) (Doomed (US), Autopsy, The Ravenous, Abscess (US), ex-Burnt Offering, Eatmyfuk, Mirror Snake)
Bill Andrews (1987-90) (Massacre (US), ex-Metalucifer)
Sean Reinert (1990-92) (Cynic (US), Gordian Knot, Anomaly (US), Portal (US), Sean Malone, C-187, Aghora, Aeon Spoke)
Gene Hoglan (1993-95) (Dark Angel (US), Strapping Young Lad, Tenet, The Almighty Punchdrunk, Testament, Devin Townsend, Old Man's Child, Phantasm, Wargod, Daemon (Dnk), Just Cause, Naphobia, Meldrum, Unearth, Dethklok)