He started playing for groups around North East Los Angeles in 1985, mainly influenced by drummers such as John Bonham, Cozy Powell and Phil Taylor.
They were inspired by NWOBHM, but Saenz modified their style to some extent- (Greg said: "We sounded like UFO, Iron Maiden and Judas Priest, but I was already playing their songs a bit faster as I had gotten into tape trading in '83 and had been turned on to hardcore punk and thrash....bands like Venom, Motörhead, Suicidal Tendencies, Slayer, and Minor Threat".
[3]) Wreched Horde was offered a demo deal with Chrysalis Records after playing a house party in Highland Park, but the band dissolved before it could gain momentum.
In January and February 1989 he recorded together with Dan Clements the background vocals for the fourth studio album by the thrash metal band Kreator, titled Extreme Aggression.
The next year guitarist Adam Siegel left the band definitely to form the alternative rock and grunge power trio My Head, with Saenz on drums and the former Bad Radio member Dave Silva on bass.
Exiting The Dwarves in 2001, Saenz took a two-year hiatus, re-surfacing in 2003 to play in various desert bands such as Eagles of Death Metal, Vega, Forever Changing Concept, and You Know Who.