United's U21s made it two wins from two matches in 2015 with a resounding victory over Coventry City at Shirecliffe on Monday afternoon.
The home side dominated from the first whistle to the last despite the wet and windy conditions and Diego De Girolamo scored a second-half hat-trick, as United netted six times without replay after the break.
Joel Coustrain had earlier opened the scoring just before half-time, before Kieran Wallace with a brace and substitute Sam Berry added their names to the scoresheet.
James Wallace completed just over an hour as he continues to regain his match fitness, whilst Craig Alcock got another 90 minutes under his belt on his return following a niggling back problem.
On a very heavy playing surface that had done extremely well to withstand a pre-match downpour, the home side were immediately on the front foot with James Wallace heading over in the Blades first attack.
Coustrain then had a powerful shot saved, before Dimaio prodded wide with the goal at his mercy. It was attack after attack for United and Kieran Wallace, De Girolamo and Dimaio all hesitated when the ball dropped in the penalty area, before Kieran's namesake James saw his goalbound header tipped on to the crossbar from Whiteman's inviting centre.
De Girolamo was the next to hit the woodwork from Coustrain's cross as United looked like being frustrated in a first-half they had bossed.
But in the final minute of the opening 45 the Blades scored, Adams controlled Long's kick forward and having been freed by Kieran Wallace, De Girolamo floated the ball to the back post where the onrushing COUSTRAIN headed home.
Within four minutes of the restart DE GIROLAMO scored his first of the afternoon, with Kieran WALLACE claiming the assist. Moments later it was the former Nottingham Forest trainee who applied the finishing touch to make it three after good work from James Wallace, who was then replaced by Sam Berry, with Whiteman moving into midfield.
WALLACE then got his second and United's fourth in the 66th minute after a threaded pass from Dimaio had sent the former Ilkeston man through on goal.
Khan and McDonagh replaced Adams and Wallace, but the goals kept coming. From a Whiteman corner on the right, BERRY rose highest to make it five. Khan was then upened in the penalty area, but although Whiteman's saw his spot-kick well saved, DE GIROLAMO scored from close range from the resulting corner.
With just over ten minutes remaining DE GIROLAMO rattled home his third with a powerful left-footed strike from the edge of the edge of the area to round off the scoring.
Blades: Long, Banton, Alcock, J. Wallace (Berry 63), McGahey, Whiteman, Adams (Khan 69), Dimaio, De Girolamo, K. Wallace (McDonagh 69), Coustrain.
Unused: Paling, Hamilton.