Butt, 31 years old was due to sign for Birmingham City after playing 29 games at the St Andrews club whilst on loan, but with relegation falling the Blues way its unlikely that the former Red Devils Midfielder will join Steve Bruce's side.
It is rumoured that the Blades could pay up to £1,000,000 for his services which as part of the deal would come with him 38 caps for his Country, something no other Blades player has achieved so far.
Nicky Butt's Statistics:
Born: 21/01/1975 Manchester
Caps: 38
Clubs:
1993-2004 Manchester United - 310 (79) + 26
2004-???? Newcastle United - 25 (3) + 1
2005-2006 Birmingham City (loan) - 27 (2) + 3
1993-2006 Total: 400 (84) + 30