Sheffield United are no exception, with ex-Everton and Sunderland man Jack Rodwell already joining this month. Here's a rundown of all the players who have been linked with a move to Bramall Lane so far this month...
5. Joe Worrall - Nottingham Forest
His side are currently pushing for a play-off place, but the powerful defender could book his ticket to the top tier early with a January move to United. Their fans would be livid, mind you! (Photo by Paul Harding/Getty Images) Photo: Paul Harding
6. Darragh Lenihan - Blackburn Rovers
Another defender who Chris Wilder is understood to be a keen admirer of, Lenihan could prove a solid back-up option for the Blades. (Photo by Lewis Storey/Getty Images) Photo: Lewis Storey
7. Glen Kamara - Rangers
He's been heavily linked with Leeds United for the past couple of months, but now Wilder's side are also said to be tracking the Finland international. (Photo by Mark Runnacles/Getty Images) Photo: Mark Runnacles
8. Loren Moron - Real Betis
Quite a surname, that. He's been linked with a £35 million move to Bramall Lane, which seems a little steep, but he has been on fire in La Liga this season. (Photo by CRISTINA QUICLER/AFP via Getty Images) Photo: CRISTINA QUICLER