Complex sentence: Sebastian's backing band during the tour included Steve Cropper, Donald' Duck' Dunn and Steve Potts, members of American soul band the MGs who recorded "The Memphis Album" with Sebastian in 2007.
Split into simpler sentences: Sebastian's backing band during the tour included Steve Cropper, Donald' Duck' Dunn and Steve Potts, who are members of American soul band the MGs. They had recorded "The Memphis Album" with Sebastian in 2007.