Emmanuel Adebayor scored a hat-trick when citah beat the mighty Lech Poznan back in Oct 2010.
Man city
Torres when Liverpool won 6-1 vs hull city and Rooney when man u won 4-1 against Portsmouth
David Bentley, then of Blackburn Rovers, was the last man to score a hat-trick against Manchester United.
It was Dirk Kyut who scored a hat-trick at Anfield on March 6th 2011
He has scored against United for Leeds and Middlesbrough
john o'shea :) he scored for man utd agaisnt Liverpool and score an own goal in the reverse fixture :)
I'm pretty sure Man Utd hasn't had a player score a hat-trick this season so far.
Paul Ince
wes brown
6 (1 whilst playing for Tottenham and 5 for Sunderland)
Man Utd. Brian Deane scored for Sheffield United against them in 1992.