The Englishman, ever since a series of dire displays against Watford and Northampton Town, only featured sporadically under the Portuguese last season.
He has since moved back to boyhood club Everton, with whom he already has two goals, while Mourinho’s Man United sit prettily on top of the Premier League table.
And Rooney, speaking on talkSPORT, noted that he could see something special developing under the Portuguese last season.
“Jose came in and last season in the league we struggled and weren’t consistent enough,” he said. “Obviously in the cups United did well. I could see where Jose was going with the team and they will be a big success.”
There is an unquestionable air of confidence about Mourinho this season that simply wasn’t there 12 months ago. His first campaign at Old Trafford, above anything, revolved around clearing up the debris left by Louis van Gaal and engendering a more direct, penetrative style.
And with Nemanja Matic and Romelu Lukaku added to the ranks, coupled with a whole year of slow but steady development, the manager clearly feels like he can now start to impose his own identity on the club.
He may have had the Old Trafford job for over a year, but work begins in earnest now.