After just one season at Lecce, he was signed by Brescia.
Except for the first season which he just made five appearances and left on loan to Serie A rival Verona, he made 56 appearances more for Brescia.
In summer 2004 he was signed by newly promoted team Fiorentina, by buying half of the registration rights from Brescia. On January 2005, Fiorentina immediately bought all of the rights.
Dainelli was the team captain after Christian Riganò left the club on summer 2005.
At the end of 2006–07 season, due to his contract expiring on summer, some rumor linked him with Juventus and other Italian clubs, but on 9 June 2007, he finally signed a new 4 years contract extenstion with Fiorentina.
EVERTON HOPES ROCKED BY LATE DOUBLE; Getting Ahead: Tim Cahill Beats Fiorentina's Dario Dainelli to an Aerial Ball Last Night
Mar 07, 2008; Byline: JOHN EDWARDS FIORENTINA 2 EVERTON 0 EVERTON'S hopes of a first European title in 23 years suffered a severe setbackhere...