Jason Curtis Newsted is an American bassist

Bass guitar

The bass guitar is a stringed instrument played primarily with the fingers or thumb , or by using a pick....

 known for his work with Metallica

Metallica

Metallica is an American heavy metal band from Los Angeles, California. Formed in 1981 when James Hetfield responded to an advertisement that drummer Lars Ulrich had posted in a local newspaper. The current line-up features long-time lead guitarist Kirk Hammett and bassist Robert Trujillo ...

, Voivod

Voivod (band)

Voivod are a Canadian heavy metal band from Jonquière, Quebec, Canada. Their musical style has changed several times since the band's origin in the early 1980s...

 and Flotsam and Jetsam

Flotsam and Jetsam (band)

Flotsam and Jetsam is a thrash metal band that formed in Phoenix, Arizona in 1982.-1981-1986: The beginning:The band's original name was "Paradox" founded by Drummer Kelly David-Smith and two other guitarists, until 1982 when bassist Jason Newsted joined. Jason had come to Phoenix with his band...

. Joining Metallica in 1986 after Cliff Burton

Cliff Burton

Clifford Lee "Cliff" Burton was an American musician, best known as the bass guitarist for the American heavy metal band Metallica....

's death, Newsted remained a member until 2001, making him the band's longest-serving bassist. After he left Metallica, he continued with his project Echobrain

Echobrain

Echobrain was an American rock musical group, who came to prominence as the first offering from former Metallica bassist Jason Newsted since leaving that band. Echobrain was formed in 2000 by Newsted, Brian Sagrafena and Dylan Donkin who had close contact with one another throughout the late-90s...

, played with Ozzy Osbourne

Ozzy Osbourne

John Michael "Ozzy" Osbourne is an English vocalist, whose musical career has spanned over 40 years. Osbourne rose to prominence as lead singer of the pioneering English heavy metal band Black Sabbath, whose radically different, intentionally dark, harder sound helped spawn the heavy metal...

 and joined heavy metal band Voivod. Newsted uses the pseudonym Jasonic, which serves as both his alias in Voivod and the name of his music publishing company.