Yes, Mark Bosinch has played for Manchester United.
http://en.wikipedia.org/wiki/Mark_Bosnich
Yes a Australian Mark Viduka has played as a striker for Newcastle United.
The following Australians have played or play at Newcastle United ;
Ricky Ponting
Clarence Seedorf has never played for Newcastle United.
The following players have played at Newcastle United wearing the number 9 shirt ;Alan ShearerPapiss Cissé ( Currently playing for Newcastle United )
Nicky Butt has played for Manchester United and New Castle.
No he played for Manchester united.
The last time Newcastle United beat Manchester United 5-0 was on Sunday 20th October, 1996. The game was played at St James Park. The Newcastle United goalkeeper for the game was Pavel Srnicek.
Louis Saha
Andy Cole Played For Both But I Dont Think He Was The Only One
Peter Beardsley
He played for Scunthorpe, Liverpool, Hamburg, Southampton, and Newcastle United. He coached Newcastle United , Fulham, and England . and He coached man city too
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Michael Owen has played for three teams in the e.P.L. They are Liverpool, Newcastle united and now Manchester United.