United's U23s recovered from conceding twice in the first-half to deservedly edge a seven-goal thriller against Leeds United at Thorp Arch on Monday afternoon.
Eoghan Stokes and Tom Pearce put the home side in the ascendency but the dismissal of Kalvin Phillips for a second bookable offence after Jake Wright had pulled a goal back before the break swung the game in the Blades favour.
David Brooks levelled for the visitors shortly after the restart, before Tyler Smith and skipper James Wilson got on the scoresheet to secure the three points that takes United up to third in the Professional Development League and make it six games unbeaten, despite Marcus Antonsson's late consolation effort.
After a quiet opening 25 minutes, it was Leeds who struck first through STOKES, who looped home an effort beyond Warhurst from the edge of the penalty area.
And that lead was doubled in the 34th minute, as PEARCE fired home from 25 yards out. But within 60 seconds United gave themselves hope as WRIGHT stormed at the home defence before scoring past Peacock-Farrell.
The final action of the first-half, in the seventh minute of added time, saw Phillips sent off after a late lunge on Reed.
Within three minutes of the restart, United restored parity with BROOKS netting a fine sole effort. Just after the hour, with the Blades dominating possession and territory against ten-men, T. SMITH put them ahead for the first time in the contest.
Leeds were visibly shell-shocked and a back-post header from captain WILSON meant United had scored three times in 21 minutes.
ANTONSSON set up a nervy final 15 minutes when he made the most of a through ball by Stokes, but the Blades held on to continue their fine form.
Blades: Warhurst, Bennett, Mallon (Greaves 76), Wilson, Kelly, Semple (Cummings 41), Slater, Reed, Wright, Brooks, T. Smith (Hirst 84)
Unused: Perryman, K. Smith.