 With ten wickets at an average of 25.90, Mooney was Ireland's leading wicket-taker in the tournament.Mooney's performance against England in an ODI in August 2011 impressed Sussex coach Mark Robinson and with the help of Sussex and Ireland batsman Ed Joyce it was arranged that Mooney would have a three-week trial with the club in May 2012.He left the trial a week early explaining that

Following the death of Margaret Thatcher, Mooney left a Twitter comment "I hope it was slow and painful".