has, in my opinion, two claims to fame. He's widely regarded as the only one to closely approximate the tone and style of Duane Almann. And his wife is Susan Tedeschi who, of course, is widely regarded as using Derek as a claim to fame.
But I gotta say, southern rock rarely does it for me. Derek really should be claiming relationship to Susan. Despite her lesser skills with the guitar, in the medium of the blues, it's all about what you do with it. And Susan, with a straightforward Fender Twin and Telecaster tone and a whiskey dark voice to make Bonnie Raitte jealous, does quite a bit.
I tried Derek out based on his claim and buzz in various guitar forums. And I have to say...
Yawn. Not enough there to play it again.