The English striker is currently doing fantastically in Major League Soccer after joining DC United from Everton.
Rooney left Man United after Mourinho’s first season in charge of the Reds and, as captain, he lifted the UEFA Europa League and EFL Cup trophies.
Mourinho is currently under significant pressure at United and some have claimed that he no longer has the support or control of the dressing room.
Rooney rubbished such suggestions and praised his former-boss.
“Obviously they are going through a difficult period at the minute but Jose Mourinho is very experienced and I think some players have to do a little bit better,” Rooney explained to BBC Sport.
“Hopefully they can turn their form around, win a few more games and keep the pressure on the top of the table and get back up there, which is where we all want to see them.
“In my experience, I have never seen or heard of a player not wanting to play in the game because they have had a falling out with the manager.
“I don’t think as a player you could do that, you’ve got to respect the club and the fans and also respect your team-mates.
“I don’t think any player, certainly at Manchester United, will be not playing for Jose, I’m sure they’re all working hard behind the scenes to get results.”
While Rooney declined towards the end of his United career, his leadership qualities and winning mentality are currently missed at Old Trafford. So, too, are those of Zlatan Ibrahimovic, another striker playing in the United States of America.
That’s a key reason behind United’s recent failures. Rooney’s support of Mourinho is a positive thing, though, as he knows both the current squad and manager and so his understanding of the situation is a good one.