Moyes reckons wearing the armband inspired him to new heights - and wants to see more of it as he decides whether to give Rooney the honour long-term.
He said: "Wayne has led by example all season. Maybe wearing the armband, he was taking a wee bit of pride in wearing that, to show exactly what it means.
"He wants to take responsibility and I think you always want players who take responsibility.
"It's the sort of magic why you talk about the top players so much, that's why you talk about Robin van Persie when he scores a magnificent hat-trick in midweek in Champions League football.
"Wayne scores two goals at West Ham and that's why players of this ilk, you write about and talk about more than many others.
"Can he excel wearing the armband? It's for him to show it. You'd have to say that he showed it here. You get opportunities in football.
"If you're a player out of the team suddenly you can get a chance, or if you become a key player and then get the chance to wear the armband and take that on. He did that.
"I've said there will be no decision taken until next season, but I thought Wayne picked up and did what he needed to do."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball