United's U23s returned to winning ways with a deserved victory over Crystal Palace at Bramall Lane on Monday.
Leon Clarke's second-half header was the difference between the sides, as the likes of Baldock, Lundstram and Thomas all got 90 minutes, in addition to debutants Carter-Vickers and Heneghan.
There was little in the way of goalmouth action early on, with Lumeka forcing Dewhurst into a routine safe the only action of note.
On the half hour, the Blades could have been in front, but Clarke just failed to connect cleanly from Gilmour's free-kick on the right. In response, Mutch fired over from 25 yards.
The Blades had the first opportunity of the second period, five minutes in, as Lundstram took a quick free kick to Hallam who fired across goal but it was just behind Clarke who couldn't turn home.
Two minutes later United came close again, Henry failed to hold a long-range effort from Thomas but reacted quickly to save from Slater on the rebound. Henry was called into action again moments later as Thomas tried his luck after Gilmour's lay off but the keeper managed to hold on.
United's pressure did eventually pay off though as CLARKE got across his marker to head home from Thomas's inch perfect free-kick in the 59th minute.
A quick counter attack almost put United further ahead as Gilmour and Clarke linked up before Smith turned his man smartly and placed his effort just wide of the post.
With less than 15 minutes remaining Clarke inadvertently blocked Heneghan's diving header on the line from a Thomas corner and less than a minute later Smith picked up a loose ball and dragged wide with the keeper out of position.
Palace threw balls into the box late on in a bid for an equaliser, but Carter-Vickers and Heneghan consistently repelled the danger as United registered a third win from four matches in the Professional Development League.
Blades: Dewhurst, Baldock, Carter-Vickers, Heneghan, Graham, Thomas, Slater (Smith 61), Lundstram, Gilmour, Clarke, Hallam (Bennett 88).
Unused: Warhurst, Cantrill, Ferguson.