The England captain is out of contract at the end of next season and he has been linked with a move to China.
But United are struggling for goals, and suffered their 14th draw of the season last night against Anderlecht.
Ray Wilkins believes Wayne Rooney can solve Manchester United's goalscoring problems
And with the Red Devils struggling up front, Wilkins wants Mourinho to get Rooney back in the side.
“Rooney in that side would be scoring goals,” he told talkSPORT.
“With the chances they are missing, when you think [Marcus] Rashford has scored something like eight in 47 appearances, that’s not enough from a forward player.
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“People will say he’s only a young man but I’m not concerned about that. If you’re playing for Manchester United you’ve got to be putting them away and I think Rooney would score.
“They need someone to run in behind teams. You’ve got people like Lingard, Rashford and Martial who will do that, but they are coming from wide areas.
“When you threaten over the shoulder of people they’re petrified. Zlatan Ibrahamivoc doesn’t do that, Rooney does do that.
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“He probably doesn’t have the pace [any longer] to do it too often, but every now and then with his craft and ability, he could do it. But they seem loathe to involve him at the moment.”