Mule (from Detroit, not the Portland band) released 2 LPs, an EP, and 2 7"s of dirty, trashy blues. Not so much a punk band as a band with punk roots, they consisted of P.W. Long from Wig and 1/2 of The Laughing Hyenas (John Brannon's post-Negative Approach project). All of their stuff is readily available through Touch and Go and Quarterstick with the exception of the 7" on Nocturnal Records. It contains Tennessee Hustler (a loose reworking of, I believe, Jimmie Rodgers' Blue Yodel #9) and a nice thick b side.