Contributions
- Probot - guitar & vocals on "Emerald Law" on their self-titled album, guitar on "My Tortured Soul (live)" on MTV2 Headbangers Ball, Vol. 2, and guitar in the video for "Shake Your Blood"
- Solace - guitar & vocals on "Common Cause" on their album 13
- The Mystick Krewe of Clearlight - vocals & E-bow on The Father, the Son and the Holy Smoke (split CD with Acid King)
- Paul Chain - vocals on "Bloodwing" and "Nibiru Dawn" on Unreleased Vol. 2
- Bullring Brummies - guitar on "The Wizard" on Nativity in Black
- Wooly Mammoth - guitar on "Mammoth Bones" on The Temporary Nature
- Sixty Watt Shaman - guitar on "All Things Come to Pass" on Reason to Live
- Victor Griffin - backing vocals on "Late for an Early Grave," guitar & backing vocals on "The Pusher/Iron Horse" and guitar & vocals on "Haywire" on Late for an Early Grave
- Shepherd - guitar on "Thursday" and "Saturday", vocals and guitar on "Sunday" on The Coldest Day
- Lost Breed - vocals on "Nation's Song," "False Glory," "Lost Breed," "Soul Chariot" and "Coffin Cheater" on Wino Daze EP
- Wall of Sleep - guitar on "From the Bottom of These Days" on Sun Faced Apostles
- Joe Lally - guitar on "The Resigned" and "Billiards" on There to Here
- Clutch - guitar solo on "Red Horse Rainbow" (left channel), guitars on "Brazenhead"
- Cor - guitar solo on "Sägeln" from the album Snack Platt orrer stirb (2012).
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