Preston paid a fee thought to be in the region of £1 million for the young goalkeeper who spent a season on loan at Preston reaching the play offs in League One.
Aside from Jordan Pickford, Declan Rudd had been the most impressive keepr in recent times under Grayson's tenure. Maxwell fought his way into the team last season and played well although still had the odd mistake in him.
It will be interesting to see who starts thew season as the number one goalkeeper with both young and eager to progress in their respective careers.