"I've got no doubts he could be an important player for us at the end of the season".
"It's quite easy to tell when someone's got something about them as a player; all four of them have got different qualities that one day or even very soon will make a United player and I think Mason's very close", Shaw said.
"We have to improve a lot".
Last season saw him concede an astounding 54 goals, surprising mostly because he's been so good for so long (He conceded 28 and 29 the previous two seasons, posting a wild 18 clean sheets in 2017-18).
Paul Pogba, who has been linked with a move away from old Trafford is also a major candidate for the position.
Perhaps appropriately, Shaw chose the launch of a new range of sunglasses - only Manchester United could have an official vision partner - to predict a brighter future.
While new signings Aaron Wan-Bissaka and Dan James have settled in well, some fans have questioned why United have not done more transfer business yet.