Complex sentence: He is the bassist for mock British heavy metal group Spinal Tap, playing alongside guitarists Nigel Tufnel (Christopher Guest) and David St. Hubbins (Michael McKean), as well as with a plethora of drummers and keyboardists.
Split into simpler sentences: He is the bassist for mock British heavy metal group Spinal Tap. He co-starred in the hit spoof rockumentary "This is Spinal Tap" with guitarists Nigel Tufnel (Christopher Guest) and David St. Hubbins (Michael McKean), as well as with a plethora of drummers and keyboardists.