Watch the The Mose Rager Roll online guitar lesson by TrueFire from Americana Greatest Hits
Lesson Source: Alonzo Pennington's Kentucky Thumbpicking
This essential roll sounds the same as the three finger roll, but uses the thumb and first finger. Mose Rager taught this technique to Merle Travis hence the name "Mose Rager Roll". You can accomplish this by dragging your thumb and picking up with the first finger.