The 19-year-old came through the Old Trafford giants' academy and made his debut aged 16 in May 2017, becoming the youngest player since Duncan Edwards to feature for the first team.
Marcus Rashford is chief among the recent graduates to have flourished and is keen to make up for lost time, having sustained a potentially season-ending back injury in January.
England forward Rashford has 22 goals for club and country this season, although he is yet to find the net since top-flight football resumed from its coronavirus hiatus.
The highly-rated 19-year-old is out-of-contract today after failing to agree a renewal with Manchester United.
"I've always had faith in the forwards we have at the club - Mason, Marcus and Anthony", Solskjaer said. "I'm very positive and happy with how the team has performed in the last few games and I think we are ready to compete with them. He'll definitely score soon".
Rashford appeared as a substitute after the hour as Norwich City took United to extra-time in Saturday's FA Cup quarter-final at Carrow Road, with captain Harry Maguire proving a more unlikely matchwinner in the 118th minute.
That win extended their unbeaten run to 14 matches in all competitions ahead of the trip to the Amex Stadium, where United have lost both their previous clashes with the Seagulls.
Man United have made more than decent progress this season under Ole Gunnar Solskjaer and the signing of Bruno Fernandes seems to have opened up a new dimension in the side.
"I think there's many teams in that battle for third and fourth", he said. That's how you get to another level.
'I'm sure Tottenham, Arsenal and Sheffield United still want to put a challenge in there, so it's exciting'.
"It's always special to play against them, my ex-club, and we are happy that we're playing against them at Wembley", said the 31-year-old.
Solskjaer added: "If you think you've got a divine right to be playing every game and are doing so well that we're not going to look for players to replace you, you're in the wrong place. It's a good place to be in".
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