Two of United's development squad have joined Hyundai A-League outfit Central Coast Mariners on-loan until the end of the season.
Sam Graham and Stephen Mallon will further their footballing developments with the Mariners, whose assistant manager is Nick Montgomery, in the coming months.
Graham, who is yet to make a first-team appearance, spent the first-half of the season on-loan at Oldham Athletic.
During his time with the Latics, the 18-year-old made a total of nine appearances, with seven of those coming in Sky Bet League Two.
Meanwhile, Mallon will be looking for some first-team action during his time with Central Coast, having fully recovered from a serious injury that has hampered his progress with the Blades.
Comfortable in a number of positions, the Republic of Ireland youth international has impressed for United's U23s this season.
Since making the move to Oz in 2012, Montgomery, who skippered the Mariners, has made the transition from a player to a coach.