Organist Booker T. Jones, Steve Cropper (guitar), Duck Dunn (bass), Al Jackson (drums; murdered in 1975); "MG" is for "Memphis Group". Part of the pool of musicians at Stax Records, and, as the MG's, they created classix like "Green Onions" and "Time is Tight". They split in the late 60s but still get together - e.g. backing Bob Dylan on a tour. Dunn joined the Cate Brothers in the 70s; he and the Cates later worked with The Band and solo Levon Helm. Jackson played on some Al Green hits.