2014concord 26 tracks the singer keyboardist and songwriter gregg allman is one of the living legends of american rock scene friends colleagues and admirers including warren haynes derek trucks susan tedeschi devon allman robert randolph jimmy hall sam moore keb mo brantley gilbert jess franklin dr john pat monahan john hiatt jaimoe taj mahal widespread panic trace adkins vince gill martina mc bride eric church jackson brown zac brown and the allman bro