We have lost one of the great our great Filipino martial arts instructors, Sonny Umpad. He was from the San Francisco area and kept a very low profile. I first became aware of his skill through an article in the now defunct, Full Contact Magazine.
Here is a homage from Jeff Finder. Who by the way, has a GREAT blog.

http://escrima.blogspot.com/2006/08/homage-to-sonny-umpad.html