Unione Sportiva Grosseto Football Club is a professional Italian association football club, based in the city of Grosseto, Tuscany. The club was founded in 1912. The team's most associated nickname is grifone, after its logo, depicting a griffon. Its colours are red and white, and it currently plays in Lega Pro.
The club was founded in 1912 as Football Club Grosseto, and made its debut in a match played and lost in Orbetello. The club joined the Italian Football Federation only nine years later, in 1921, being admitted in the Promozione division. In 1927, the club changes its official colours from black/white to the current white/red. Since its foundation, Grosseto played extensively from Serie C to the amateur leagues. In 1995 the club was cancelled by the football federation because of financial troubles, thus losing the right to participate in the Serie C2 after having won Serie D the same year. Following these events, Grosseto joined Eccellenza, ending it in fifteenth place being therefore relegated to Promozione. Two consecutive promotions from 1997 to 1999 however brought Grosseto back to Serie D. In 2000, Piero Camilli purchased the club with the aim to bring Grosseto back in the pros. In the 2001–2002 season, Grosseto ended as Serie D (Round F) runners-up, but were later admitted to Serie C2 to fill a league vacancy. The club successively won Serie C2 in 2004, being thus promoted to Serie C1. In 2005, Grosseto qualified for the promotion playoffs, losing the semifinal to Pavia; one year later, Grosseto gained again a spot in the playoffs, where they defeated Sassari Torres in the semi-finals, but lost to Frosinone in the finals, missing the opportunity to be promoted to Serie B for its first time in history. However, in the 2006–2007 season, under head coach Antonello Cuccureddu, who replaced Massimiliano Allegri after the ninth matchday, Grosseto finally managed to win Serie C1/A following a 1–0 away win at Padova in the final matchday with a goal by Carl Valeri, thus gaining a historical spot in the Serie B 2007-08. Cuccureddu left Grosseto by mutual consent with the club a few days following the triumphal win, and Giorgio Roselli was appointed to replace him for the 2007–08 Serie B club campaign.
The club started their historical first Serie B campaign with three disappointing consecutive defeats which led, on 11 September 2007, to the dismissal of Roselli and his replacement with former Parma boss Stefano Pioli, who led the team to a mid-table finish.
The 2008–09 season started with higher expectations under new head coach Elio Gustinetti; the team started its season showing a very impressive form, but then a result crisis led Grosseto out of the promotion playoff zone, causing the dismissal of Gustinetti and his replacement with Ezio Rossi.
The 2009–10 season was a relatively good season for the club, which finished in 7th place only a few points off the play-off zone. It was although a memorable season for Grosseto, thanks to their top striker Mauricio Pinilla who scored 24 goals in 24 matches and was transferred to US Palermo, in the Serie A, during the 2010 summer transfer market.
On 10 August 2012 Grosseto was provisionally, not yet enforceable, relegated, by the Disciplinary Commission set up for Scommessopoli scandal investigations, to Lega Pro Prima Divisione because of their involvement in Scommessopoli scandal. Furthermore,the president of Grosseto has been suspended from all football activities for five years. But on 22 August 2012, Grosseto and its president are absolved by the Court of justice, completely eliminating the verdict of the first instance and so readmitted to Serie B.