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. however, on 28 january, mooney's loan was extended until the end of the season.