On stage he appears as a humanoid creature with a face resembling a bear-trap, usually portrayed wielding an enormous battleaxe.

Before Derks joined the group in 1988,[2] the original 1985 Gwar lineup featured two separate characters Jaws of Death and BalSac.

[citation needed] Douglas returned to the band as Balsac the Jaws of Death for the recording of Gwar's first album Hell-O.

Derks has occasionally been featured as a vocalist, his vocals can be heard on the songs "Obliteration of Flab Quarv 7", from This Toilet Earth, and "Mary Anne" from We Kill Everything.

Slave Pit, Inc. claims Derks joined the band in 1988, making him the longest-serving member of Gwar, following the death of Dave Brockie in 2014.

In the video to "Immortal Corrupter", he is seen playing a yellow-to-black Washburn Dimebag Darrell 333 guitar with red lightning bolts.

Derks's guitar was stolen after the August 16, 2002 Dave Brockie eXperience concert which was recovered and given back to him by a fan in 2010.