One of those two was at Manchester United but apparently he never turned in another performance anything like as good as that again.
Last season he got just five starts in the Championship and scored his one and only league goal in a 2-2 draw at Colchester in February in a 2-2 draw. To add to that he scored twice in a 5-0 Carling Cup win over Morecambe and scored the 'Balloongate' goal in the FA Cup victory over Manchester City.
He wasn't though in manager Kevin Blackwell's plans and he said of Shelton: "Luton wasn't exactly what I was looking for, he was a bit of a maverick. This opportunity arose for him to play regularly and is just what he needs at this stage of his career."
Sheffield United have received an initial £1 million for Shelton but there are also add ons and a sell on clause.