Fabiani was born in Valencia, Spain to an Italian father and an Equatorial Guinean mother related to Edmundo Bossio Dioko, a politician executed during the regime of Francisco Macías Nguema.
He made his Segunda División debut in the 2011–12 season at the age of already 27, with CD Alcoyano, after having scored 12 Segunda División B goals the previous campaign to help the team return to the second level after an absence of 42 years; his first game in the second level of Spanish football occurred on 22 October 2011 as he came on as a late substitute in a 1–4 home loss against FC Barcelona B,[2] and he netted his first and second goals in the competition on 27 May of the following year to contribute decisively to a 4–0 home win over Elche CF, but his team had already sealed their relegation.
[5][6] On 21 September 2013, Fabiani made his debut in the I-League, which was an eventful affair as he scored two goals, provided one assist and was also sent off after 77 minutes of play for a second bookable offence.
[7] He later sustained an injury while playing against Mohun Bagan AC which ruled him out for four months, so on 26 October he was released and replaced by Riga Mustapha,[8] returning to former club Huracán.
[14] Subsequently, Fabiani ceased to be called until Henri Michel, who at the same time gave little importance to the Spanish-born players, resigned from his position as national team coach.