Powell’s marvellous goal helped his team overcome Cheltenham 2-0 in the League Two play-off final.
Sir Alex Ferguson has been tracking Powell for several weeks and now the Red Devils have made their move.
Around £2m of the fee is paid up front and the rest will follow, based on the teenager’s appearances.
It is possible the youngster will go back to Crewe on loan for a season and he is thought to be anxious to secure he will be playing regular football next season.
Obviously one for the future here, but by all accounts Powell is a really good talent. Would prefer to see him play at a higher level than Division one next season though. If he is going on loan, why not to a Championship side?