[Who dat?]

Sometimes he sounds white, sometimes he sounds black. Whenever I hear an accent like that, it usually turns out the person is from Louisiana.

To me he sort-of sounds (NW) black trying to sound southern. At any rate he isn’t from SE Texas or SW Louisiana IMO. They’re more “mumbly.” (Like Boomhauer on King of the Hill.)

[Space Wrangler]

That's not a southern accent. It's someone trying to sound southern. In certain parts of the statement there is no accent at all, and then it goes to an overkill level on the southern accent. IF it is a southern accent, it's someone who hasn't lived in the south in a long time.