 Nyora kupfuurira kweiyi ndima - Castellazzi akatevera Brescia kukwidziridzwa kuSerie A muzhizha ra2000. Akaita kutanga kwake Serie A musi wa 21 Ndira 2001, vachipesana naVicenza. Mumwaka wa2001-02, aive sarudzo yekutanga yechikwata asi mumwaka unotevera akarasikirwa nenzvimbo yake kuna Matteo Sereni. Mushure mekukweretwa kuReggina neCatania mumwaka wa2002-03, akazopedzisira ave mutambi wenguva dzose zvakare mumwaka wa2004-05, umo akatamba mitambo yese makumi matatu nemasere yeSerie A. Castellazzi pakutanga sarudzo yekutanga yemwaka wa2003-04, asi akarasikirwa nenzvimbo yake kuna Federico Agliardi mushure mezuva remutambo 4 uye akawanazve nzvimbo yake pazuva remutambo 23. 