The 25-year-old midfielder was informed last month that he will never skipper the Red Devils again after openly criticising his manager's tactics.
Ashley Young captained United in Antonio Valencia's absence against Newcastle United last weekend - a game in which Pogba was awarded the Man of the Match accolade.
Hugo Lloris lifted the trophy in Moscow in mid-July as Didier Deschamps' captain, and Pogba said he would continue being an influential figure in the squad even if he never replaced the Tottenham goalkeeper.
'You do not have to be a captain to speak.
Despite his struggles at United, Pogba was one of six members France's World Cup squad to be named in the list of 30 nominees for the Ballon d'Or, released by France Football on Monday. "You don't have to be captain in order to speak, a leader is not someone who has the armband".
However, following the break, there was an evident step in terms of the performance levels and Pogba was one of those who stepped up his game after Mourinho made a decision to play him in a deeper midfield role than his usual position. And now I think I'm a little more open, I express myself a little more.
"When I see how Paul behaves towards his current club situation some may say that he's done everything he could mentally and when it comes to his individual performances to help the club", noted the Les Bleus tactician, who was quick to add.
"I think the World Cup is the flawless habitat for a player like him to give the best".
Lloris is the other member of Didier Deschamps' triumphant squad nominated while Real Madrid striker Karim Benzema, an outcast at global level, made it a seventh Frenchman on list for the award.