They can't all be flops, though, surely?
He was very good at Arsenal. Even on his bad days, where he would lose the ball often, he'd always contribute something. Not contributing at all at United.
That said, his performances are like night and day when you compare them to how he was doing in pre season, and I strongly believe that's because he's not playing down the middle.
That's because pre season is lower level than friendly games. Fletcher was by far our best player few years ago during pre season when he had problems with his fitness/ilness, and finished at WBA that season, he couldn't keep up after two games in premiership. Pre season form means feck all.
There's two possible reasons for his poor form:
a) he is simply not even close to the player he was - more likely considering it's quite obvious he is not at his best when you look at his pace and explosivness, it's not at that level it used to be
b) Mourinho doesn't know how to get the best out of him - less likely considering he hardly had any good games for us even during rare moments when the team played well.