Nigel Clough has wasted little time in reshaping his United squad ahead of the 2014/15 campaign, he has recruited two attacking players - including paying a fee for a striker.
Clough has added to the Scottish contingent, securing the services of striker Marc McNulty, who he tracked at Derby County, in addition to adding the experienced Jamal Campbell-Ryce to the Blades ranks.
McNulty joins on a three-year contract for an undisclosed fee, whilst Campbell-Ryce has agreed a two-year deal, effect from the 1st July, when his deal with Notts County expires.
McNulty, 22, is United's second capture from Livingston this calendar year following signing of Stefan Scougall back in January.
Livingston finished in mid-table in the Scottish Championship last term and McNulty impressed, scoring 19 times in all competitions.
In total, he has scored 45 goals in 88 starts for Livi after making his debut as a 18-year-old in 2009.
Meanwhile, Campbell-Ryce returns to South Yorkshire for a third time, having previously represented Rotherham United and Barnsley
The experienced winger is a Jamaican international and played full games for Notts County in both fixtures against the Blades last season, making one of the goals in the encounter at Meadow Lane in January.
The 31-year-old is approaching 400 senior appearances.