|Date of birth||25 May 1974|
|Place of birth||Lipari, Italy|
|Height||1.91 m (6 ft 3 in)|
|2005–2006||→ Empoli (loan)||33||(5)|
|2008||→ Siena (loan)||17||(1)|
|2009–||San Frediano Rondinella S.S.||68||(13)|
* Senior club appearances and goals counted for the domestic league only and correct as of 12 February 2009.
Riganò started his career with amateur team Lipari, where he gained a reputation of a prolific striker. In 1997 he moved to then Serie D team Messina, but he failed to impress there. This was followed by two season with Igea Virtus, another Serie D team, and 28 goals with the Sicilian side. In 2000, at the age of 26, he finally entered into professional football with Taranto, being instrumental in the rossoblu's promotion in their first season, and an impressive Serie C1 campaign the following year, being crowned Serie C1's topscorer with 27 goals in the 2001–02 season. In 2002, he joined Florentia Viola of Serie C2, and scored a personal record of 30 goals in 32 matches. In 2003, he scored 23 Serie B goals in 44 matches, helping Fiorentina to win promotion to Serie A and earning his Serie A debut in age of 30. During the 2005–06 winter transfer window, he was loaned to Empoli with little success.
In August 2006 he was transferred to Messina, making a very impressive season, scoring 19 goals in 26 appearances, finishing third on the top scorer chart in Serie A. To make it even more impressive, he sustained an injury in January which saw him miss action for three months.
On August 2007 he signed for Levante UD but scored only four goals in 13 matches during his stay with the Spanish side, being then loaned out to Siena during the January transfer window. He was then released for free by Levante after the Valencian club went relegated to Segunda División, and joined Lega Pro Prima Divisione club Ternana on 31 August 2008. His time at Ternana however proved to be disappointing, as Riganò played only a handful of matches, being then excluded from the first team on November. On 2 February 2009 Riganò accepted a permanent move to Cremonese, another Lega Pro Prima Divisione club, where he re-joined Emiliano Mondonico, his former head coach at Fiorentina. He successively left Cremonese at the end of the season.
- Acuerdo con el FC Messina para el fichaje del delantero Christian Riganò (Spanish)
- "CONCLUSO IL MERCATO CON QUATTRO ARRIVI". Ternana Calcio (in Italian). 1 September 2008. Retrieved 5 July 2013.CS1 maint: unrecognized language (link)<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- "RIGANO CEDUTO ALLA CREMONESE" (in Italian). Ternana Calcio. 2 February 2009. Retrieved 5 July 2013.CS1 maint: unrecognized language (link)<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- "Mercato: arrivano Riganò e Anzalone" (in Italian). US Cremonese. 2 February 2009. Retrieved 12 February 2009.CS1 maint: unrecognized language (link)<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>[dead link]