Guitar, bass, drums and the blues. It’s back to basics for Mike Zito. He’s returned to the riff-fueled blues-rock that inspired him to make music in the first place.

It’s been nearly a decade since Zito previously waved his guitar hero flag. His departure in late 2014 from Royal Southern Brotherhood—the supergroup that originally featured Zito, Cyril Neville, Devon Allman, Yonrico ...