Hirax is an American thrash metal band from Buena Park, California. Starting in 1984 under the leadership of vocalist Katon W. De Pena, the band played in Los Angeles and San Francisco with the other new thrash metal bands of the area such as Metallica, Exodus and Slayer. The band was a clear example of the thrash/speed metal/crossover genre. After releasing some demos, Hirax signed with Metal Blade and debuted with their first full-length, "Raging Violence" in 1985. The band was composed of Katon W. De Pena (vocals), Scott Owen (guitar), Gary Monardo (bass) and John Tabares (drums).
This is the band Paul Baloff was in (in 1988)after his Exodus days (and before joining Exodus again some 8 years later). Not much info can be found about this band. Baloff left the band soon after their 2 song demo (and only release - rumoured to be produced by Metallica frontman James Hetfield) to try his luck with Bay area gods Heathen (he only stayed for a 2 song demo here awell).
He then founded a new Piranha with a complete different lineup but they disbanded soon after.
Mortal Sin is a thrash metal band that formed in 1985. The group formed around singer Mat Maurer and drummer Wayne Campbell in Sydney, Australia. At first Campbell had attempted to get Maurer into another band called Wizzard but the rest of that band was reluctant to support the idea so the pair struck out on their own, quickly recruiting Wizzard's guitar Keith Krstin, bass player Andy Eftichiou from a band called Judge and a second guitarist Neville Reynolds. Reynolds was fired for not being available to play at the band's very first show and was replaced by Paul Carwana.
Rising out of Pomona, in the Los Angeles, Ca. outer suburbs, Bonded by Blood have rapidly emerged as one of the youngest (average age just 18) and arguably one of most proficient of the New Thrash wave of acts pouring out of that city in recent times. Formed in the summer of 2005 by a 17 year old hardcore-punk-thrash driven vocalist (Aladdin), he soon teamed up with like-minded young guitar shredders (Alex Lee and Juan Juarez)...
There are 2 bands with the name Defiance: (1) Defiance is a thrash metal band from Oakland, California. While virtually unknown to mainstream metal and rock circles, Defiance is known as one of the classic second-tier thrash bands to come from the Bay Area thrash metal scene. They played a decidedly technical style of thrash originally evoking bands like Testament, though they would later move on to playing in their own unique, more progressive thrash style. They reformed in 2005 and have since release an album entitled The Prophecy in late 2009.