Lukaku left Chelsea FC earlier in his own career after a lack of opportunities and after successful spells at West Brom and Everton, he finally became the first-team player he wished to be.
Ironically, Lukaku is the person stopping Rashford from getting his opportunities, and Carragher urged Rashford to consider his options and look to the successes of his team-mate when making the decision.
He said on talkSPORT: “The problem he’s got, and it’s the same for every young striker at big clubs, nothing’s harder than that position.
“Romelu Lukaku is in front of Rashford and I don’t see Rashford displacing him as long as he is there.
“But remember when Lukaku was at Chelsea and he had to come away and go to Everton.
“Then he ended up as top-scorer and got his move to Man United.
“You know you are going to play every week as the centre-forward and you know if you have a couple of games where you don’t score then you are still going to play the next week.”
Lukaku joined Chelsea FC in 2011 but never scored for the Blues in the league after finding himself with opportunities limited, behind other striking options.
He decided to leave on-loan, at first to West Bromwich Albion and then to Everton, who he eventually joined on a permanent deal in 2014.
His performances at Everton lead to a move to Manchester United in 2017, and he landed ahead of Rashford in Mourinho’s plans.
Now it is Rashford who must decide whether to stay at the club that gave him his chance in English football or take a seeming step backwards and leave for the guarantee of starting as a striker.
The success of his teammate may come as solace, but the fairy tale start to life in professional football has quickly stagnated and Rashford will be feel something will need to change soon.
MORE: Man United latest news
MORE: Arsenal latest news
MORE: Chelsea latest news
MORE: Liverpool latest news