But he will reinstate the job when he feels Michael Carrick is ready for the position.
He will now link up with Mourinho's coaching staff, but Carrick will not be a like-for-like replacement for assistant boss Rui Faria, who has chose to step down after 17 years working alongside Mourinho. But in the short term, at least, Mourinho is not searching for a replacement for his long-time sidekick.
Jose Mourinho confirmed before the game that the Frenchman would start against Watford in the final match of the domestic year. "I am going to jump on the staff", he said. "I'm not going to have an assistant managing in the sense of the word".
But it could only be a temporary departure from the normal management set up.
Michael Carrick's absence on the field will no doubt be felt after he called time on his 12-year stint at the Manchester club.
Phelan explained that Mourinho is taking a gamble by opting not to have a number two man at the club as it's important to have essential knowledge of the game, "It's a gamble for him - he's saying he hasn't got anybody in that group already to replace Faria, whether he goes looking outside who knows?"
With 18 goals and 8 assists to his name, Bale has averaged a decent 125 minutes per goal ratio and his late resurgence provides a case for Mourinho to rethink his transfer plans.
"If that moment arrives, I will be a very proud guy because this man came to me when he was a kid 17 years ago. I have nobody in the world of football to be my assistant manager - nobody", Mourinho continued.
"Their neighbours are breaking all these records, playing the way they are, and then there are 70,000 people turning up at United every week sitting there and thinking: 'What's in the programme?' It has not been entertaining, and it has been The Mourinho Way".
"I'm there to give my opinion". When you have all of this, along with confidence in each other, it is obviously a lot to lose.
Signed by the legendary Sir Alex Ferguson, Carrick has a full trophy cabinet from his time with the Red Devils which includes five Premier League titles, a Champions League medal, an FA Cup and three League Cups. I am sure he will teach me a few things and we will have some success in the near future, I am certain of that.
The United manager will employ some new faces also for his reconstructed backroom team. "I am going to improve my staffing in the performance level in relation to the fitness and the relation with the tactical work".