David Warren "Dave" Ellefson is a bassist and founding member of the American thrash metal band Megadeth. He has also been known as "Junior" to differentiate him from Dave Mustaine. Ellefson currently resides in Scottsdale, Arizona. In addition to playing bass guitar in Megadeth, Ellefson also has various side projects which include Temple of Brutality, F5, and Killing Machine.
