There are two artists known as Mark O'Connor 1. Mark O'Connor (born August 5, 1961 in Seattle, Washington) is an American bluegrass, country and classical fiddler, composer and music teacher. O'Connor's music is wide-ranging, critically acclaimed, and he has received numerous awards for both his playing and his composition. As a teenager he won national string instrument championships for his virtuoso playing of the guitar and mandolin as well as on the fiddle.