Early years

One of Fitzgerald's first bands was Dies Irae where he played bass with guitarist Jack Lee Galbraith (Taylor) and drummer Robert "Yoda" Hill. Later, he formed the band Totally Uncalled Four and was in a hardcore punk group called Don't No. He was also the guitarist and songwriter for Gherkin Raucus and Xtra Large.

The Vandals

Fitzgerald has been a member of The Vandals since 1989.

Oingo Boingo & Danny Elfman

In 1993, he joined Oingo Boingo as a second guitarist and performed on their final studio album and live album. After the band broke up in 1995, he jokingly said if he could get his job back at Taco Bell, where he was working 2 years prior.^[1] Fitzgerald has since worked on several projects with Danny Elfman, including his 2022 solo album Big Mess.

Other projects

Other bands Fitzgerald has worked with include Tenacious D and The Offspring on their 2008 tour.

Apart from performing as a live instrumentalist, Fitzgerald has also worked as a producer, composer and songwriter, having worked with a wide range of musicians including Dweezil Zappa.^{[citation needed]} Fitzgerald produced Jughead's Revenge's 1996 album Image Is Everything. He is credited as a songwriter on the School of Rock soundtrack.^[2] He also provided string arrangements for the Alkaline Trio album Crimson and contributed guitar work to the Team America: World Police soundtrack.^{[citation needed]} As of 2012, Fitzgerald is credited as a writer and composer on The Hub cable series The Aquabats! Super Show!, including a co-composing credit for the series' theme song and several onscreen appearances playing a hobo. In August 2017, Fitzgerald played guitar for Avenged Sevenfold's cover of the song "Runaway".

Outside of his music, he finds work as both a painter and a writer.^{[citation needed]}