Kammala jumla mai zuwa: Napoli ta lashe gasar cin kofin Coppa Italia ta 2012 a kan zakarun gasar zakarun da ba a doke su ba Juventus a ranar 20 ga Mayu; wannan ita ce asarar Juventus kawai a wannan kakar, kuma taken farko na Napoli a cikin shekaru sama da 20. A ranar 11 ga watan Agusta na wannan shekarar, kungiyar ta sha fama da rashin nasara 4-2 a lokacin karin lokaci ga Juventus a gasar cin kofin duniya ta UEFA.
2012 Supercoppa Italiana, wanda ya ga an kori 'yan wasan Napoli biyu da Mazzarri. Ya bar "Azzurri" a ranar 19 ga Mayu 2013, bayan ya jagoranci su zuwa na biyu da kuma wani wuri a gasar zakarun Turai a karshen kakar 2012-13 Serie A; wannan shi ne mafi kyawun kulob din a cikin shekaru 20.