Jermaine Pennant, Scored an own goal for united as a Liverpool player and scored against united as a Liverpool player and won the Prem with THE ARSENAL but was born in Jamaica but has represented England.
It could be Robbie Fowler and Michael Owen.
in 1997 Manchester uniteds scored 10 goals against Liverpool
Dirk Kuyt scored three goals against Manchester United
paul ince Michael Owen
The four footballers from Liverpool to score against Manchester united, are Steven Gerrard, Dossena, Fernando Torres