 Mooney would go on to tally 21 goals in his first two years at the club.On 21 June 2013, it was announced that Mooney had signed a new two-year contract with Leyton Orient, with manager Russell Slade hailing him as intrinsic to the way that Leyton Orient play.He started the 2013–14 season with aplomb, scoring eight goals in the first 10 games of the League One season.