We take a closer look at some of the players who have been linked with a move to Teesside this season – scroll down and flick through our picture gallery to see some of the names which have been mentioned:
1. Jack Clarke - Tottenham
The teenager was recently recalled from a loan spell at Leeds due to his lack of game time. Several Championship clubs, including Boro, have been linked with the winger. Photo: George Wood
2. Jordan Jones - Rangers
A recent report from the Daily Mail claimed Boro were looking at a loan deal for their former winger. Jones came through the Teessiders' academy before moving to Kilmarnock in 2016. Photo: Ian MacNicol
3. Ivan Toney - Peterborough
The in-form striker attracted plenty of interest in the summer, though it isn't believed Boro made a bid. Posh chairman Darragh MacAnthony was recently asked about the Teessiders' reported interest, to which he replied: "They love him, that’s for sure. But sometimes what you love isn’t what you can afford." Photo: Luke Walker
4. Sam Cosgrove - Aberdeen
Reports in Scotland suggested several Championship clubs, including Boro, were tracking the 23-year-old frontman. It was even reported that Boro assistant Robbie Keane went to watch Cosgrove during Aberdeen's meeting with Rangers in early December. Photo: Ian MacNicol