"J.P."
'(<a href="http://www.j-archive.com/media/2008-07-11_J_30.jpg" target="_blank">Jon of the Clue Crew doesn't fret at all.</a>)  <a href="http://www.j-archive.com/media/2008-07-11_J_30a.jpg" target="_blank">This</a> man who revolutionized bass playing with the group Weather Report made his own fretless bass by pulling out the frets & filling in the grooves'
Jaco Pastorius