However, Longford Town were relegated to the League of Ireland First Division, albeit with a six-point deduction, and lost the FAI Cup final to Cork City.
Representatives from Premier League side Fulham were said to have been in attendance at the FAI Cup final, and Leeds United manager Dennis Wise had also watched Mooney in action.
In a game against Derry City at The Brandywell, Mooney scored twice in a minute to bring the game (which Derry had dominated) level at 2–2, and come close to completing his hat-trick just moments later with a 30-yard effort that came back off an upright (a goal from Denis Behan eventually gave Cork all three points).
He scored twice in his first three appearances for Norwich, including the opener in a 2–0 win over Cardiff City and the only goal of the game against fellow relegation candidates Plymouth Argyle.
On 16 October 2009 it was announced that Mooney would be joining League One side Charlton Athletic on an emergency loan until 1 December.
[9] He made his first team debut the next day, coming on as a late substitute in Charlton's 2–1 victory against Huddersfield Town at The Valley.
After two more appearances as a substitute, Mooney was handed his first league start for the club against MK Dons at The Valley on 14 November, and scored an equalising goal in the 13th minute to set the Addicks on their way to a 5–1 victory over their promotion rivals.
He opened his side's account again in a 4–2 home win over Bristol Rovers on 24 November, prompting Charlton manager Phil Parkinson to extend Mooney's loan deal with the club for another four weeks, until 28 December.
Having played a part in three of his side's goals, Mooney sustained a knee injury in the club's 4–4 draw against arch-rivals Millwall on 19 December, which saw him out of action for the rest of 2009.
He returned to Reading at the end of the year, only to re-join Charlton again on 14 January in a new loan deal set to run until 11 February.
Mooney then scored twice on his full debut for the club, with a pair of first half goals in a 3–0 League Cup win over Hereford United.
On 3 July 2015 Mooney signed a two-year deal with League One side Southend United, moving on a free transfer.