Maybe try a little gentle dodging to lift the shadows at the back of the head and connect them to the rest of his head. Or else clone them out altogether.
This may be an artefact of Photobucket's compression - it might look better on the full size file.
Thank you very much for the suggestion. I tried crooping it but it swallows some of the dark area, therefore much of the lower right end, which I consider necessary to enhance the mood and facial expression.