The Sleepwalkers have been playing authentic Americana roots rock since 1992. They specialize in original American music styles ranging from blues, country, Tex-Mex, Cumbia, and their own brand of roots rock.

In 1999 they released their first album Can't Stop Rockin' on Relampago-go records, which earned them positive national reviews, and a nomination for Best Americana album at the San Diego Music Awards. Their songs "Dead of Night" and "Vas A Ver!" were included in the movie Ofrenda Desnuda in 2007, which was directed by International Film Award Winner, Guillerma Von Son.

In 2008, the Sleepwalkers recorded a cover of Bart Mendoza's song "Days & Maybe's" (re-titled "No Me Cueste"), which was included on Forty One Sixty: The Songs of the Shambles.

Since their inception, they've played with top National artists & legends such as Link Wray, Ronnie Dawson, Sleepy Labeef, Charlie Ryan, The Texas Tornados, The Blasters, The Fabulous Thunderbirds, Kid Ramos, The Beat Farmers, Freddy Fender, The Rev. Horton Heat, Big Sandy, The Supersuckers, BR5-49, The Blazers, Paladins, Johnny Legend, Rosie Flores, The Mighty Blue Kings, Graham Parker, El Vez, The Royal Crown Revue, Big Bad Voodoo Daddies, Roy Condo, Harry Dean Statton (and many
others), & have garnered 6 nominations for Best Americana/Roots band by the San Diego Music Awards.

Mostly active from 1992 to 2002, they reformed in 2013, and continue to play their original brand of Americana and roots rock. In early 2014, drummer Dick Winter was replaced by Bob Osuna. Action Andy Rasmussen left the band in 2015, after recording on the group's sophomore album. Guest musicians include Jeremiah Silva on rhythm guitar, plus David Fleminger on several tracks.

As of 2016, the lineup included Johnny Valenzuela, Alan "Big Al" Fuentes, Ritchie Orduno, Danny Angulo, and Bob Osuna. Their next CD release Roots Rockin’ features mostly original songs written by the band. It continues their tradition of mixing original rockabilly, country, cumbia, and even some surf music. The album was nominated for Best Local Recording at the 2017 San Diego Music Awards.

In 2017, bassist Danny Angulo was replaced by Paul Denton (of the Miff Laracy Band). By the end of the year, Alan "Big Al" Fuentes had left the group, leaving the quartet of Valenzuela, Osuna, Orduno, and Denton.

Former guitarist Gene Edwards went on to play with Dwight Yoakam's band in the 2000-teens.