Three On A String is Jerry Ryan's Birmingham, Alabama-based band. They used to appear at bluegrass festivals throughout the southeast, but for several years they have been more of a full-time show band, working national conventions, etc. The band is still very active, with a large number of enthusiastic and faithful followers.
Bobby Horton, the banjo-player for TOAS, has become rather well-known for his many albums of Civil War Music, and for his work on the Ken Burns series on the Civil War as well as the Baseball series which Burns did. They have performed well and widely for some 30 years, nearly, with hardly any substantive change in personnel. They're dear friends, and fine fellows.