Leahy opened his 2007 Junior campaign with Dublin by scoring a total of 0-10 (0-9f) against Louth in the quarter final of the Leinster Junior Football Championship. Dublin then progressed to the semi-final against neighbours Wicklow. Leahy continued with his impressive scoring for Dublin by getting 0-8 (0-3f, 0-1 '45').
Dublin's 2007 Junior campaign began with a strong showing from Leahy, who scored 0-10 (0-9f) against Louth in the Leinster Junior Football Championship quarterfinal. Dublin then moved on to face Wicklow in the semi-final, where Leahy added to his tally with 0-8 (0-3f, 0-1 '45').