Real name: Jeffrey Lewis Hetrick

Effective period / Period of releases: 2011

Jeffrey Nothing (born Jeffrey Lewis Hetrick, also known as Jeff Hatrix, (May 5, 1960 in Cleveland, Ohio) is the vocalist for American alternative metal and industrial metal band Mushroomhead.
Jeff Hatrix was also the singer of a Cleveland-based metal band called Hatrix, as well as fronting Purgatory, in the '80s. Jeff relocated to New Orleans for a while during his stint with the band White Heat.

In June 2007, he launched his own clothing line. The designs are currently in the works, and more are expected to be released soon. According to his fans, Hatrix is known to be very humble and kind when meeting fans after shows.

In 2008, he announced he will release a solo album titled The New Psychodalia.