England's all-time leading goalscorer has notched double figures every season since signing for Manchester United from Everton 11 years ago.
But he has scored just twice in the league this season and has not laid on a single goal for his teammates.
The world and its wife has an opinion on the reasons why Rooney is experiencing such a difficult time of late.
Manager to blame
"He suffers because they don't attack in the same numbers as when they believed they could outscore whoever they came up against," Le Tissier told Sky Sports.
"This is probably the longest slump we've seen.
"He has had dips in form before but I don't remember him having ever struggled for this long.
"That's what the manager's job is, getting the right results."
So is Le Tissier right?
Yes van Gaal's first responsibility is to the team and getting Manchester United back challenging for titles again.
But he also has a responsibility to the traditions of the Red Devils and to playing freeflowing attacking football each and every time they play.
Much of the criticism aimed at United this season has been as a result of a more patient, considered style with the emphasis on keeping clean sheets and building from there.
The Old Trafford great had the fewest touches of United’s outfield players and spent the final 22 minutes on the bench against Leicester City last time out.
Indeed he only ran more than goalkeeper David De Gea so something is most certainly amiss.
What is not up for debate, though, is that if United are to be serious title contenders this season they will need Rooney firing on all cylinders from here on in.