The Oak Ridge Boys are mourning the death of Phyllis Carr, the mother of their longtime touring guitarist, Don Carr. The group announced Phyllis’ death in a statement on social media on Thursday (March 14). “We all loved Mama Carr,” the statement reads. According to her obituary, Phyllis Carr died on March 8 at the age of 88. She’s described as an outgoing, positive person who frequently attended live music concerts, including the shows her son played with the Oaks. In addition to her musical son, she is survived by a daughter, a sister and multiple grandchildren and great-grandchildren. A bio…