The Canadian club have been trying to keep the 15 year-old away from publicity but he had already shone six times as a sub before starting the 3-3 draw against Colorado Rockies on September 24.
The Sun says Canadian sources claim United's America scout Jorge Alvial will check him out at home to Seattle Sounders this Sunday.
Liberia-born Davies could well start this game too as the Whitecaps seem certain to miss out on the play-offs, so can look more freely to the future.
Vancouver would surely demand a huge fee for a remarkable player equally blessed with pace and technique.
Davies has already played several Canadian Championship and CONCACAF Champions League games, as well as featuring for Whitecaps' under-16s and under-18s.