Related Information for Mark Olson Mark Olson is one of the founding members of acclaimed alternative country bands The Jayhawks and The Original Harmony Ridge Creek Dippers and a respected singer/songwriter in his own right.Olson formed The Jayhawks in 1985 with singer/guitarist Gary Louris and was originally the principal singer/songwriter in the group. Along with Marc Perlman (bass) and Thad Spencer (drums), they released their eponymous debut album in 1986 through independent label Bunkhouse Records. The band were sign.. read more