While playing for the Galway representative team, he broke Kevin Doyle's scoring record in the under-18 FAI Youth Interleague competition with 21 goals.

After three years with Salthill Devon,[5] Faherty chose to defer going to college[10] and, despite interest from clubs including Ipswich Town and Coventry City, joined Galway United, his hometown team, in July 2007.

[11] Described by the Galway Advertiser as having "impressed when introduced for his debut" against Cork City,[12] he appeared regularly for the remainder of the season, sometimes in the starting eleven but more often as a substitute.

[13] Faherty's first senior goal for the club coincided with Jeff Kenna's first game as manager, as Galway lost 3–2 at home to Bray Wanderers in April 2008.

However, Palace's reserve games were postponed because of heavy snow,[18] and when Faherty discovered that players were not being paid because of the club's financial difficulties, he returned to Ireland and signed for St Patrick's Athletic for the 2010 season.

Faherty finished the 2010 league season as St. Patrick's Athletic's top scorer, with his goals including a diving header against rivals Shamrock Rovers and away to Bohemians.

[28] Faherty scored a 90th-minute equaliser away to Drogheda United in the FAI Cup quarter-final replay to take the game into extra time, and converted his kick in the ensuing penalty shootout to help the Saints reach the semi-finals.

[34] He made his league debut for the club on 5 August, as a second-half substitute in a 1–1 home draw with St Patrick's Athletic; he shot over the bar with the last kick of the match.