Middlesbrough F.C. with supporters' clubs across the globe. The largest supporters' clubs include the Official Supporters' Club, the Middlesbrough Disabled Supporters' Association, Yarm Reds, Red Faction and Middlesbrough Supporters South. Middlesbrough supporters' main rivals are Sunderland (with whom they contest the Tees–Wear derby), Newcastle United (with whom they contest the Tyne–Tees derby), and Leeds United, a fact confirmed by planetfootball.com's 2004 survey. Carlisle United see Middlesbrough as their biggest rivals, but Middlesbrough supporters have not reciprocated, as they do not see Carlisle as a top three rival. The nickname "Smoggies" was first used as a derogatory term by opposing supporters; it relates
Middlesbrough F.C. after his arrival, Tony Mowbray left the club with immediate effect. Aitor Karanka, a former Spanish defender and assistant coach at Real Madrid to José Mourinho, became the new Middlesbrough manager on 13 November 2013, signing a two-year contract. He became the first non-British manager at the club, which finished the season 12th in the final league standings. In his first full season in charge, Middlesbrough finished fourth and thus qualified for the 2015 Football League play-offs. After seeing off Brentford 5–1 on aggregate in the semi-final, the club lost 0–2 to Norwich City at Wembley Stadium in the final.