Though the fans still chant his name, there is a real conflict over whether he should be celebrated after at least one transfer request saga and numerous anecdotes of underhand contract negotiation tactics and poor lifestyle choices affecting his performances.
However, looking at his and the club's achievements during Rooney's time at Old Trafford, it's impossible to say that he isn't already one of United's greatest players ever.
He may not be the "White Pele" as Sven Goran-Erkissen once christened him, but having scored his 200th club goal for United against Bayer Leverkusen - climbing to fourth in the list of all-time scorers for the club - and amassed an impressive haul of trophies, to say that he hasn't fulfilled his potential while wearing red would be wrong.
David Moyes has set his former Everton protege the challenge of scoring 30 goals for United this season, a feat that would put him within touching distance of Sir Bobby Charlton's club record of 249 goals.
With that target in mind, and just under 10 seasons worth of action for United to sift through, now feels like the right time to rundown Rooney's 30 greatest moments in a United shirt, from 2004 to today.
What are your favourite Rooney moments for United?