Ashley Young at full-back has proven to be more and more of a disaster as the season has gone on.
Louis van Gaal criticised Ole Gunnar Solskjaer for not placing enough trust in young players last month and the Norwegian is yet to really respond.
Van Gaal would have by now called up dynamic young defender Ethan Laird, who has been impressing for the under-23s.
Laird can play at right-back or at centre-back and could have been useful over the past few weeks.
Solskjaer must look to get him involved before the end of the season.
Laird is just 17-years-old and only signed a professional contract at United last year.
He has played a key role for the club in the UEFA Youth League run to the knockout stages and is an England youth international.
Giving him an opportunity at right-back seems a must, with Ashley Young looking woeful.
Now, the upcoming fixtures are tough, and not ideal for Laird, which may be why he has been held back.
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Everton away, and then Chelsea and Manchester City might not be the best scenarios to hand Laird a debut.
After that it eases up a little, against Huddersfield and Cardiff, which could be ideal.
Laird is a player who likes to get forward from full-back and has linked up well with Mason Greenwood at youth level.
United need to get him into the first team before the end of the season, and give themselves a different way to move on from Ashley Young.