Saenz was the lead singer for the David Lee Roth-era Van Halen tribute band Atomic Punks from May 1994 to December 2008, where he used the stage name David Lee Ralph. He was briefly the lead singer for L.A. Guns, singing on the Wasted EP. He also has sung for the bands 7% Solution, First Cause, Longgone, and Nightfall. The latter was featured on the KNAC radio sponsored Pure Rock compilation, with Ralph going under the name Michael Saenz.
Saenz appeared briefly in the 2001 film Rock Star, seen in the glass booth auditioning when Mark Wahlberg's and Jennifer Aniston's characters walk into the audition. He glares at the two before Wahlberg's character takes his turn to audition. He provided background vocals for AFI on the albums Sing the Sorrow and Decemberunderground.
Saenz and his wife, Jocelyn, live in Los Angeles, California.