Mourinho said some of his stand-in players, proved why they are not picked every week.
Anthony Martial and Marcus Rashford started at the Amex Stadium, with Romelu Lukaku and Alexis Sanchez not involved. Both forwards struggled to influence the game as Pascal Gross’ header secured Brighton’s Premier League survival.
Paul Pogba also put in a below-par performance, among several others, but Mourinho reserved his criticism for the replacements, without naming names.
“Not good enough, because the players that replaced others did not perform at a good level, and when individuals don’t perform at a good level it’s difficult for the team to perform at a good level.
“So maybe now you understand why some players play more than others, and you don’t ask all the time why A, B and C don’t play more,” Mourinho told Sky Sports.