From DCO today (Phil Marshall precedes a performance of "Free" with about 3 minutes of banter about David, in the Youtube linked by Sky) :
Sunday, April 25, 2010 - 11:10
sky....:
...
David painted in Tulsa, and he also tended bar. I am not sure of the timeline though. But Monty was from Tulsa. And I know that when David first opened for Phil Marshall it was Monty who got him the gig because Phil talked about it in a youtube that I saw. Phil said Monty came to me and said a guy named David Cook will be opening for you. Phil saw him and said why is opening up for me, I have to match him?
http://www.youtube.com/watch?v=JK9sL-OdOHU