[1] Hernández joined Kyuss in 1994, replacing previous drummer Brant Bjork who had left the band for personal reasons.
In 2004 he recorded an EP, and briefly toured, with former Queens of the Stone Age bassist Nick Oliveri's band, Mondo Generator.
Hernández was a founding member of the band Yawning Man, and later teamed up with fellow ex-Kyuss drummer Brant Bjork and Dave Dinsmore to form Ché.
Hernández played in Vic Du Monte's Persona Non Grata with Chris Cockrell and James Childs until 2011, recording three albums, two EPs and completing 10 tours since 2005.
[2] He currently plays in the desert hardcore band "Family Butcher" Hernández is also involved in a project with Mike Neider (Bl'ast/LAB) and Dave Dinsmore (Bl'ast/LAB/Unida/Che) called "Gusto".