Rashford scored twice from the bench against Charlton on Tuesday night, to take his tally to 15 goals for the season.
Maguire played all 90 minutes in the 3-0 win, helping the Red Devils continue an impressive winning streak.
England star Maguire said while he is not surprised to see Rashford performing so well, he is delighted to see it.
Maguire hails Rashford
Maguire told United’s website he was thrilled to see Rashford enjoying his football and reaping the rewards, enjoying the best stretch of his career.
He said: “I know what he’s capable of. I’ve seen him for four years now, I’ve seen him at England before that, how talented he was.
“I can’t speak highly enough of his talent and it’s really good to see him playing with a smile on his face and enjoying his football.
“He’s a really important player for us and if we’re going to do well this season we need him firing, and I’m really happy he’s doing that for the team and for himself.”
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United have a huge game upcoming against Manchester City, before Crystal Palace, Arsenal, and then the Carabao Cup semi-finals.
Maguire on Mainoo
Maguire also praised young debutant Kobbie Mainoo, who at 17, was making his first ever appearance for the club.
The Red Devils captain told MUTV: “This club since I’ve been here four years now they give chances to young players when they are doing well, and Kobbie has been doing really well in training.
“He thoroughly deserved his start and he will learn a lot from it, a great experience for himself and his family and he did brilliantly out there.”
Mainoo is even eligible to play in tonight’s FA Youth Cup game, that’s how young he is; but he has now been fast-tracked by Erik ten Hag.
Just for Ten Hag to be giving him opportunities in training in the first place, is a great sign, and that Mainoo is making the most of them, says everything about his talent.