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').
Leahy's impressive performance kicked off Dublin's 2007 Junior campaign with a strong showing of 0-10 (0-9f) against Louth in the Leinster Junior Football Championship quarter-final. This was followed by Dublin's advancement to the semi-final against Wicklow, where Leahy added another 0-8 (0-3f, 0-1 '45') to his tally.