Boz Scaggs

William Royce "Boz" Scaggs (born June 8, 1944) is an American singer, songwriter and guitarist. He gained fame in the 1960s as a guitarist and sometimes lead singer with the Steve Miller Band and in the 1970s with several solo Top 20 hit singles in the United States, along with the #2 album, Silk Degrees. Scaggs continues to write, record music and tour.

source: Wikipedia