Arriving as if from outer space in the early '00s as something of a Jimi Hendrix of pedal steel guitar, Robert Randolph rose out of the "sacred steel" of gospel churches that have been subbing the instrument in place of a church organ since the '40s. After fronting his own band as well as the jam-band blues supergroup the Word, Randolph has returned to his roots with his blues-soaked new project, the Slide Brothers, which also features pedal steel players Calvin Cooke, Aubrey Ghent, Chuck and Darick Campbell. Otis Taylor opens. Royce Hall, UCLA, 340 Royce Drive, Sat., 8 p.m. $15-$50. http://cap.ucla.edu.