Academy duo Sam Graham and Tyler Smith have signed professional contracts with the Blades.
The youngsters who have both enjoyed excellent campaigns in United's development age groups have put pen-to-paper on two-year deals.
16-year-old defender Graham has committed his future to the club until 2020, with his professional deal coming into effect once he has completed his scholarship.
Meanwhile, Smith's contract will turn pro on the 1st July 2017, after completing two seasons as a scholar with the club.
Academy Manager Travis Binnion remarked: "Sam and Tyler have both enjoyed excellent campaigns for both the U23s and U18s and this is the reward for their efforts."
That's three Academy players, all of whom are Sheffield born and United fans, that have now committed their long-term futures to the club during the course of this season, after Regan Slater signed until 2020 in December.