▁Chicago ▁in ▁ 1 9 6 1 , ▁and ▁graduated ▁from ▁the ▁University ▁of ▁Chicago ▁in ▁ 1 9 6 4 , ▁where ▁he ▁performed ▁on ▁piano ▁at ▁campus ▁" tw ist ▁parties ," ▁popular ▁at ▁the ▁time . ▁It ▁was ▁at ▁these ▁parties ▁that ▁N aft alin ▁first ▁played ▁with ▁bl ues ▁harm onica ▁player ▁Paul ▁But ter field ▁and ▁guitar ist ▁El vin ▁Bishop , ▁the ▁nucle us ▁of ▁what ▁was ▁to ▁become ▁the ▁Paul ▁But ter field ▁Blues ▁Band . ▁ ▁N aft alin ▁then ▁came ▁to ▁prom in ence ▁as ▁the ▁keyboard ▁player ▁in ▁the ▁But ter field ▁Blues ▁Band , ▁from ▁ 1 9 6 5 - 1 9 6 8 . ▁On ▁the ▁group ' s ▁first ▁album , ▁he ▁sol os ▁and ▁has ▁a ▁writing ▁credit ▁on ▁the ▁instrument al ▁track ▁" Thank ▁You ▁Mr . ▁Po ob ah ." ▁On ▁the ▁second ▁album ▁by ▁the ▁band , ▁East ▁West , ▁he ▁is ▁cred ited ▁as ▁" N aff y ▁Mark ham ". ▁ ▁In ▁the ▁late ▁ 1 9 6 0 s , ▁after ▁the ▁first ▁four ▁But ter field ▁albums , ▁N aft alin ▁went ▁out ▁on ▁his ▁own , ▁sett ling ▁in ▁the ▁San ▁Francisco ▁Bay ▁Area . ▁There ▁he ▁put ▁together ▁the ▁Mark ▁N aft alin ▁" R h ythm ▁& ▁Blues ▁Rev ue " ▁and ▁has ▁been ▁active ▁in ▁bl ues ▁and ▁rock ▁recording ▁sessions , ▁solo ▁gig s ▁and ▁rev ue ▁shows , ▁and ▁as ▁a ▁producer ▁of ▁concert s