Due to injuries and suspensions Blades boss Danny Wilson has been forced to delve into the loan market and recruit Hill, 30 formerly with Barnsley has made close to 300 appearances with the Tangerines and is on loan until the end of the season.
Egan, 19 has enjoyed a loan spell at Crystal Palace this season from Premiership Sunderland, he joins the Blades for only 28 days.