For decades Greg Versen has spun vinyl (and then CDs) live on one of the region's only on-air blues music shows: Blues Valley (on WMRA Saturday nights, eight 'til late). And to begin with:
1) He really is a professor
2) His accent is genuine: Mississippi.
Here's the Blues Valley playlist source (with a link to buy music --and to do so in a way that sends tip$ to WMRA) and here's the Blues Valley Facebook page.