Despite his complete lack of experience in the division, Cosmi immediately won hands down Serie D, leading Arezzo back to professional football.

A new club with the Associazione Sportiva Dilettantistica Atletico Arezzo denomination was entered in Serie D.[2] In November 2010 the club was acquired by a consortium of Rome-based entrepreneurs (including popular actor Luca Zingaretti) for a sum of €400,000; the new owners immediately made a number of changes, appointing former Cagliari player Maurizio Coppola as head coach and former Serie A star Abel Balbo as assistant coach and technical area coordinator.

[3][4] On 1 July 2012 the club was renamed Unione Sportiva Arezzo[5] with Balbo as new head coach, replaced since 30 October 2012 by Michele Bacis.

[8] After the club ended in third place, Ezio Capuano was named new head coach; later in September 2014, Arezzo was readmitted to Lega Pro to fill a vacancy.

For the 2016–17 season, the club came with a new head coach, Stefano Sottili, and a number of major signings such as former Serie A player Davide Moscardelli.

Highest scoring and best win: Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Two legends of the Arezzo midfield during the 2005–2006 season were Simone Confalone and Daniele Di Donato ("Dido"), who ruled the pitch with their tough, but sensual play.