No United player has featured more regularly under Mourinho than Rashford, who has appeared in 102 of the team's 117 competitive matches as both a starter and substitute.
Mourinho was also confident that the Belgian striker will be fit for 19 May, saying that he will not play in the Premier League this season. "So in this moment, for me, he is staying". The most important quality is to be a man and football is not full of them.
"Now his body says enough, the club and myself want to keep the man".
Mourinho will be determined that his side does not suffer another defeat, following last weekend's with the Seagulls and will be telling his players to do all they can to ensure they get the three points on the night.
Pogba, who joined United for a then-world record £89m in the summer of 2016, has made just 25 Premier League appearances for the club this season, scoring six goals. "We are confident", said Mourinho.More news: Police hostage crisis at Indonesia jail over
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"I trust some [players] over others that could bridge that gap".
"Unless you can do that, you have to keep players you don't love - when I say love, I say it "footballistically" - and players you don't totally believe have the level of the squad". I understand them better than anybody. "Unless there is a flawless squad, where you buy one goalkeeper you don't like, you buy another one".
I think we need both things that you mentioned.
"Of course he has qualities that we believe can make him a good coach and there are many ways to do the bridge between player and coaching staff".
Mourinho said last week that there was "no chance" of goalkeeper David de Gea, voted the club's player of the year, leaving after he was linked with a move to Real Madrid. "Big and small, I don't like it [those terms], but that's the way I can express it".
With United ending their campaign against West Ham and Watford - two teams in the bottom half of the table - they have the opportunity to end the season on a winning note.