The 18-year-old has operated as a centre forward and a winger for Man United so far this season.
He has now revealed he used to play in the No.10 role for the U16s and could play there again for the first-team.
Speaking about his versatility, Rashford claims he has more to offer the Portuguese boss when it comes to the matches.
“I don’t regret playing in that position because it means now I can still play there if I need to – no.10, on both wings and up front as well,” he said.
“It means I have more in my armoury when it comes to the matches.
“I used to look up to players who would dribble at people, creating chances, scoring too. But the type of the player I want to be now is different to the type of player I wanted to be then.”
Mourinho has used Wayne Rooney as his No.10 this season, but following the 3-1 defeat to Watford, he is facing plenty of criticism.
Fans have urged the Portuguese boss to drop Rooney after his string of disappointing showings and he has previously stated he would have no problem leaving his captain out of the squad.
Rashford has often excelled in a central position and he has the pace to offer which Rooney lacks, but would his goal scoring talent be wasted in the deeper role?