The Blades have secured the services of another promising youngster on a long-term contract.
Dominic Calvert-Lewin, 18, has signed a new deal which will run until the summer of 2018.
The tall, versatile player has been a regular in United's U21s this season and has had tastes of first team football. He was on the substitutes' bench for last season's FA Cup victory at Aston Villa and for two Sky Bet League One fixtures during this campaign.
Sheffield born-and-bred Dominic is a graduate of United's Redtooth Academy, having been schooled in the Shirecliffe facility since the age of eight!
Dominic said: "I am delighted that the contract is sorted and I'm really looking forward to continuing my football development. I've loved the ten years I've had with United so far and hopefully there is plenty more to come. It has been great to progress through the Academy to the U21s and being with the first team on a number of occasions has given me an incentive to push on further."
Boss Nigel Clough added: "This is yet more credit to the Academy and the staff, Dominic is another to progress to the first team squad, he is a very exciting prospect. We recognised his ability very early on, hence putting him on the bench against Villa, but injuries have curtailed his progress slightly. We are delighted that he has committed to the Club, we are keen to monitor his progress and maybe he will get a first team chance before the season's out."
Dominic and Louis Reed are currently on long-term contracts, whilst the Blades recently offered one-year professional deals to six others to progress through United's scholarship system at Shirecliffe.