Michael Doyle has signed a new contract with the Blades, which has seen the midfielder commit his future to Bramall Lane until the summer of 2015.
In the absence of Chris Morgan and Nick Montgomery, the Dubliner now has assumed the role of club captain on a permanent basis under boss Danny Wilson.
The skipper formed a formidable partnership with Kevin McDonald in the Blades engine room last season, clocking up 50 starts as United racked up 90 points and made it to the League One play-off final at Wembley.
Since arriving in South Yorkshire from Coventry City in January 2011, Doyle has become something of a favourite amongst Unitedites, who appreciate his whole-hearted and committed style of play.
Speaking after signing his new deal, the 31-year-old said: "I spoke to the manager in pre-season and he mentioned about the possibility of extending my stay and I was more than happy to discuss.
"I had a great time last season, it was the most enjoyable in my career to date, it was unfortunate the way it ended, but I feel I can play my part in getting this club back into the Championship at the very least.
"I enjoy coming to work and working with my boss, the people throughout the club have made this feel like home and I was only too happy to extend my stay until 2015 - hopefully, if I am fit and healthy, the club will still want me beyond this deal."
Boss Wilson added: "We had been talking to Michael for a while. He has been absolutely outstanding since we arrived at the club, he has taken over a big mantle of skipper from Monty, but he has done it admirably.
"It has been such a smooth transition and from the club's perspective we need a player like him around the place. He is a real character in the dressing room and a real dogged character on the field with very high standards that rubs off on others around him.
"This is a marker from the club that we want to look beyond the next six months or so, our long-term planning was to keep Michael tied down and this should send out great vibes."