2006
Vaughan received a place on Dublin's starting panel for the first time this season in their 2006 league encounter with Mayo. He lined out at left corner forward.
Mark began Dublin's leinster championship defence on the starting 15 and scored 1-0 in the process against Longford. He was dropped for Dublins next match against Laois. He came on as a sub against Laois playing quite well and setting up a goal although he failed to make an appearance in the Leinster senior football championship final which Dublin won. Vaughan made a second half substitute appearance against Westmeath in the All Ireland Quarter Final in Croke Park. Vaughan again made a second half substitutes appearance against Mayo where he twice hit the upright while also missing a 45 metre kick which would have tied the game up for Dublin.
While attending a nightclub after the Mayo game Vaughan was in an argument and had his cheekbone broken. Despite this incident, Vaughan had publicly stated that he would be cheering on Mayo to collect the All-Ireland title.
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