Based on when you asked this I assume you mean when they played in October 2013. Luis Suarez was still on his ban for biting Ivanovic, so Daniel Sturridge played alone up front.
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.
Liverpool and Manchester united are very close but Manchester United have played better over the last few seasons
No one has. not as far as i can tell anyway. Paul ince played in London Manchester Liverpool and milan derbies but not Glasgow. Craig bellamy played in Manchester, Liverpool London and Glasgow derbies. Andrei Kanchelskis played in Glasgow, Liverpool, and Manchester. Robbie Keane has played in London,Liverpool,milan,and Glasgow but not in Manchester. Patrick Viera has played in London, Milan, and Manchester derbies. As far as i can tell no one has yet.
The first match in September 2008 at Anfield was Liverpool 2 Manchester United 1. The second match in March 2009 was one of the matches of the season, Manchester United 1 Liverpool 4.
Michael Owen
peter beardsley
Paul Ince for Manchester United, Inter Milan and Liverpool
Craig Bellamy
There are a few Michael Owen played for Liverpool , Manchester United and real Madrid. Nickolas Anelka played for Arsenal, Real Madrid and Chelsea. Diego Forlan has played for Manchester United and Villarreal and Athletico < Madrid.
The club he played against was Liverpool.
Peter Beardsley
No player has played for all four teams. Bolo Zenden has played for Liverpool, Chelsea and Barca.