Manchester United boss Louis Van Gaal has admitted that his captain, Wayne Rooney is not guaranteed of starting every game. Rooney has been a constant figure under Van Gaal and has been lucky with injuries this season. He’s played sixteen (16) out of the twenty (20) Premier League games United have played this season. His run in the side have also been helped by his ability to play in the midfield, thereby creating the playing room for the Van Persie – Falcao striking combination.
But Van Gaal has said Rooney’s starting place depends on the balance of the team.
He told MUTV: "It's dependable on how the balance of the team is. I need balance in the team. I'm looking for balance. I hope to perform better because then the game shall be more attractive. I don't know if I shall use him always because it's so dependable on the form of the strikers.
"He's also a very good striker so I can use him in different positions and I like that because I like multi-functional players than specialists’’.

Source: http://redlyunited..com/2015/01/van-gaal-rooney-may-not-always-start.html