From The Tennessean:
Bluegrass legend Dr. Ralph Stanley died Thursday night after a battle with skin cancer, according to a Facebook post by his grandson, Nathan Stanley.
Dr. Stanley was 89 years old and a member of the Grand Ole Opry and the Bluegrass Hall of Fame. After receiving an honorary Doctorate of Music from Lincoln Memorial University in 1976 (and another one from Yale in 2014), he was known to bluegrass fans worldwide as “Doctor Ralph.”