Cool,.....Cullman is in more Black king (L.g.nigra) territory, but my range map does depict an odd thin "finger" of possible holbrooki intergradation from the west on each side of the river in the next counties a good ways north of Cullman and into the west. With that said though, Cullman, and north, south and east of Cullman are still 100% nigra as well from the center of Alabama (where all three ssp.intergrade) and also pure Black (nigra) all the way up through Tennessee and into the southern half of Indiana.
In other words, I'd say it's a juvenile patterned L.g.nigra, and will likely get more solid black as it matures...
Here is one from Lawrence County in the next county diagonally from you.......you can JUST barely make out a vague pattern from when it was a juvenile.......a sweet looking animal!..
cheers, ~Doug

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"a snake in the grass is a GOOD thing" 

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