Middlesbrough have only signed Rajiv van La Parra this month.
Middlesbrough boss Tony Pulis looks set to offload a number of his first-team players this month.
Boro ran out 5-0 winners over Posh in the third round and some fans can't believe they've seen their side score that many in one game.
Middlesbrough’s Martin Braithwaite has been tipped to leave the club.
Middlesbrough will look to strengthen during the January transfer window.
Sheffield Wednesday could be joined by Nottingham Forest and Middlesbrough in parting company with their manager.
The Guardian's fan-led Championship pre-season preview had a Boro fan loosely predicting a finish of "anywhere between second and 20th".
Blackburn Rovers boss Tony Mowbray is still a popular figure among Middlesbrough fans.
Georges-Kevin N'Koudou will be hoping to earn game time with Tottenham Hotspur in the EFL Cup after Middlesbrough's surprise exit on Tuesday night.
Tony Pulis saw his Middlesbrough side knocked out of the Carabao Cup against Burton Albion.