Rashford and Martial have often been left to scrap for one starting position but the eventual emergence of Jesse Lingard and the arrival of Alexis Sanchez has seen them shunted back.
Rashford has been in good form when he has played this season, netting 12 goals and providing nine assists in all competitions.
An incredibly tenuous report from the Mirror curiously stated on the same day that Rashford, despite being Mourinho's most used player at Old Trafford, wanted to leave for the same reason as his French teammate.
A stat that many would not know is that Rashford is the player that Mourinho has played the most during his tenure at the club, something that the Englishman was proud to learn too.
Rashford has started just 30 of the 70 Premier League games in which Mourinho has been in charge in the Portuguese manager's near-two seasons at the club.
When Martial not being first-choice was brought up, Mourinho explained: "If I was you I would go with why [Romelu] Lukaku plays every match, why [Nemanja] Matic plays every match".
"If you want dry answers, I have dry answers".
'Only 11 can start. "Everyone's excited to just go there and do as best as we can". That would be wonderful economically for the football club if you had only 11 with no injuries and no suspensions and no fatigue. "Marcus Rashford is the player with the most appearances since I arrived at the club", Mourinho replied tersely.
President Donald Trump addresses the nation on Syria
But during the weekend, images of dead and sick women and children again circulated following another alleged chemical attack. The Syrian president on Wednesday made a public appearance with a group from an worldwide Muslim body in Damascus.
"Only 11 can start so the same questions you are doing to me, you should do to every other manager because everyone has players in the same situation".
Mourinho previously indicated he will not look to sign another forward at the end of the season, despite regular links with Real Madrid's Gareth Bale, and he confirmed again he will not seek to enter the market again.
And on whether he will be in the market for another striker, Mourinho said: "If I have more competitions for him (Romelu Lukaku) I have more competition for the other ones you are saying are not happy because they are not playing".
"So how can I?"
City needed to beat United last Saturday to secure a third Premier League title in seven years - and despite roaring into a 2-0 half-time lead, United managed to hit back to claim a 3-2 win and put City's celebrations on ice.
"In our case, we come from a big result and during the week".
'And make the players understand that it's not enough to deserve to finish second, you need the elements.