The 28-year-old’s participation in England’s 2026 World Cup campaign meant he reported to pre-season a little later than some of his Man United teammates.
Rashford has spent the past 18-months away from his boyhood club, first joining Aston Villa on loan and then heading to Barcelona.
Barcelona had the option to buy him for a reported £26 million, but opted against it, instead signing Anthony Gordon from Newcastle.
Rashford has now arrived at Carrington and could even feature in United’s pre-season friendly against Leeds in Dublin on Wednesday (August 12).
Head coach Michael Carrick has also hinted that Rashford could be reintegrated into the squad.
"I've played with him. I played in the game he made his debut, so we have a history," he said after the 1-1 draw with PSG.
"We have a full squad next week in Dublin. We fly straight there and meet Leeds on Wednesday. We have a few days in Dublin where we have the whole squad, including Marcus, Kobbie and Lisandro."