Owens Boomer Castleman (July 18, 1945 – September 1, 2015), better known by his stage name Boomer Castleman, was an American singer-songwriter and guitarist. He and Michael Martin Murphey teamed up to make the pop music group The Lewis & Clarke Expedition in the 1960s. His single Judy Mae peaked at #33 in the US charts. He also founded the independent country music record label BNA Records which he later sold to BMG Music. He invented the palm pedal.