Duke

From "The Bowling Show" episode of television sitcom Roseanne (01/21/1992). Real musician David Crosby (of Crosby, Stills, and Nash) tapped deep into his inner pudgy, disheveled bar rocker to play, well, a pudgy, disheveled bar rocker performing to a mostly empty bowling alley bar in this episode. Duke may have had a last name, but we never find it out.

Other band members were Hank and Pete.