David Ellefson
 David Warren Dave Ellefson (born November 12 1964) 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.