3. Anderson
The 26 year old Brazilian who is currently enjoying his loan spell at Fiorentina was once brought in by Sir Alex as an enthusiastic and promising teenager. As has been the case with Nani, the midfielder showed a lot of potential but then fell pray to injuries and fitness struggles and could rarely make it into the first team.
Anderson is enjoying his football in Italy and has an opportunity to kick start his career in Italy or somewhere else. He will have some memorable moments in a Man United team as well as a Champions League and four Premier League medals.