Danny Wayland Seals was born Feb. 8, 1948, in McCamey, Tex. His father, an amateur guitarist who performed with Bob Wills and Ernest Tubb, worked as a pipeliner in the oil fields of West Texas. Mr. Seals’s older brother, Jim Seals, played in fiddle championships as a child and later had several pop hits as part of the 1970s duo Seals & Crofts.