The Teessiders have lost just two games all season and have the best defensive record in the division, so could they mount a serious promotion challenge?
Here are the latest Championship promotion odds from bookmakers SkyBet after 13 league games:
21. Watford - 13/8
League position: 5th - 23 points Photo: Ross Kinnaird
22. Brentford - 13/8
League position: 9th - 20 points Photo: Clive Rose
23. Norwich - 4/5
League position: 1st - 27 points Photo: Pool
24. Bournemouth - 8/11
League position: 2nd - 26 points Photo: Marc Atkins