Career
Mutarelli started his career at Serie A club Atalanta, making his debut in April 1996 in a 3–1 loss at home to Lazio. After four seasons in Bergamo, Mutarelli was sold to Genoa in January 1998. With Genoa, Mutarelli made 138 appearances in Serie B.
In 2002, Mutarelli moved again, this time south to Palermo.
He spent two seasons in Serie B with the rosanero, before the club made a glorious return to Serie A in 2004-2005.
He continued his excellent form in the top flight, and after one season was rewarded with a move to capital club Lazio, signed a 5-year contract as free agent. In 2007-2008, Mutarelli was hampered by injuries and did not have a season as successful as the last.
He made his debut in the Union of European Football Associations Champions League, but was sent off against Werder Bremen. Involved in a contract dispute after having been frozen out of the Lazio side at the beginning of the 2008-2009 season, Mutarelli took his case to court and was freed from his contract.
He then joined Bologna in January 2009.