Kieffer Moore celebrates after scoring Wrexham's fourth goal in the clash with the Blades.
Kieffer Moore scored twice as Wrexham produced a remarkable fightback from 3-1 down to defeat his former club Chris Wilder's men in a pulsating 5-3 second-tier encounter.
The forward's sweetly-struck first-time shot put United ahead, but Wrexham levelled just two minutes later thanks to a deflected own goal.
Bamford's second and a Callum O'Hare nod appeared to have put the visitors in command at 3-1, before the towering striker pulled one back with a thumping goal of his own.
Ryan Longman's glancing effort early in the second period made it all square, before the goalscorer to put Wrexham ahead for the first occasion with 14 minutes remaining.
Josh Windass' composed spot-kick late on wrapped up the points, halting a sequence of five matches without victory for the Welsh club.
In their previous meeting in the cup competition back in 2023, it ended in a epic 3-3 draw.
This latest clash delivered another high-octane, dramatic chapter in their recent history.
With the support of high-profile investors, the club's meteoric rise through the leagues has brought them back to the second tier for the first time since the 1980s.
Ahead of this fixture on the back of a poor patch of form, the boss had called for a return of the characteristic fighting qualities from those past encounters.
His team certainly responded, overcoming a 3-1 deficit to secure a memorable 5-3 victory that underscores their never-say-die attitude.
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