No player has featured more times for United in Mourinho's time as manager than Rashford.
YOU can lambaste Jose Mourinho for his - at times - pragmatic approach to football or if you disagree with how he deals with the press but one thing you cannot question is his approach to Marcus Rashford.
It's absolutely brutal from Mourinho but it's actually impossible to argue with his assertion that the former Inter Milan manager is the worst manager that the Premier League has seen, statistically at least.
"I read some quote from the worst manager in the history of the Premier League, Frank de Boer-seven matches, seven defeats, zero goals".
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If he has one or two not good games, he puts him out.
Rashford started his first Premier League game of the year against Liverpool and took his chance by scoring both goals in the 2-1 win at Old Trafford.
The United boss had an acerbic response to hand when he addressed a news conference ahead of Tuesday's Champions League showdown with Sevilla, seemingly holding De Boer responsible for Palace's slump extending to seven winless and scoreless matches as Roy Hodgson picked up the pieces at Selhurst Park. Does he play every match from the start? No?
"Tomorrow is a very hard match, playing against a team that didn't lose against Liverpool home or away [in the group stage], that drew in Liverpool and I say Liverpool because they are an example of a very good team in a big stadium with a big tradition".
"If he was coached by Frank he would be coached how to lose because he lost every game".
It's never a good idea to get into a war for words with Jose Mourinho.
"I try to give the best to the kid, I have to be honest and give the credit to the people of the academy that was responsible for his formation".
"But if you go by numbers and how many matches he played with me last season and this, I would say probably he's in the top five players with more matches in the two seasons".
As it turns out, the 20-yea-old has made more appearances during Mourinho's reign at United than any other player.