As of March 2011, the last player to score a hat trick against Liverpool is Manchester United's Dimitar Berbatov.
Fernando Torres the last hatrick scorer in the league.
Julio Baptista, Carling Cup, 2007.
last Celtic player to score a hatrick against rangers
Wes Brown(own goal against Liverpool)
Julio Baptista, also for Arsenal in a League Cup tie in 2007.
Who was the last player to score 5 touchdowns (in a career) against FSU by himself
Ashley Neal in a reserve game was the last. Julien Dicks was the last in a first team game.
I think it was Arsenal, beat them 6-3 in 2007, Julio Baptista scored 4 making him the first player in 61 years to score 4 against Liverpool at Anfield.