CIRCA: is a progressive rock supergroup founded by four musicians associated with Yes: current Yes member Alan White (drums), former Yes members Tony Kaye (Hammond, keyboards) and Billy Sherwood (bass, vocals), and guitarist Jimmy Haun, who played on the album Union. Origins Jimmy Haun and Michael Sherwood (Billy's elder brother) were childhood friends and went on to form the band Lodgic, which Billy joined in 1981. A few years after Lodgic had split up, Billy Sherwood was introduced to Yes bas… (More on Circa)