Leeds lost the second Yorkshire derby they played in a row, having drawn the first one 1-1 with Sheffield Wednesday.
And Sharp, who came on as a second-half substitute, admitted it was a 'poor defeat' but thanked fans for their support.
Hard 2 tweet after poor defeat,but thank u 2 every fan that came & a special mention to the 1s that walked from ER 2 the game #ljsfoundation— billy sharp (@billysharp10) October 17, 2014
A group of supporters had raised funds for charity by walking the 30-mile journey from Elland Road to the New York Stadium.
It was organised by The Square Ball fanzine, with the proceeds shared between the Leeds Children’s Hospital and the Luey Jacob Sharp Foundation – the charity set up by Sharp himself and his partner following the death of their son in 2011.
On-field, however, Leeds' defeat means new boss Darko Milanic is now without a win in four Championship games.