Portrait identification needed.

[Dirty Digger Doug]

My wife bought a picture at an auction and it came bundled with some others that nobody bid on. This is one of them. It's a charcoal portrait and if you click on the picture of the artist name and enlarge it you can make out the name. I have tried and cannot find anything. So I am coming to the best to help identify who this may be. What do you think?

 

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[vpnavy]

I searched Google and found Pocket Gamer's Christmas Freebies #3 - DOUG DUG "...That, right there, is the central conceit of the compelling dirt-digger Doug dug. (You win no points for guessing that it's inspired by Namco's 1982 arcade game Dig Dug.)...". I am sure this isn't the guy in the portrait!