Newcastle United and Manchester United go way back. Even though they couldn't possibly be further apart in terms of league positioning following the 2014/15 Barclays Premier League campaign, both are huge clubs in England and are on par in terms of heritage and tradition. There was a time, believe it or not, when the two sides were the best in the land and battling it out for the Premier League title as every single Geordie dreamed their way through a fantastic period in the club's history. It was business as usual for Sir Alex Ferguson's men, as that 'been there done that' know how gave them the edge while The Magpies lost their heads. Newcastle famously found themselves 12 points clear of the Red Devils in the title race only to see the league trophy snatched from their grasp in one of the most shocking turnarounds in football history. And that is where the fortunes of either club went in completely opposite directions. Which in turn has had a direct influence on the following list. Not since a certain England intentional forced Kevin Keegan on to the steps of St James' Park has a transfer directly from NUFC to MUFC happened. There have been plenty head in the opposite direction though... For better or for worse. Here's 11 players that have been registered to play for both Manchester and Newcastle United during their respective glittering careers.