Founder members of the Premier League in 1992 , Middlesbrough won the Football League Cup in 2004 .
Founder members of the Premier League in 1992 , Middlesbrough were beaten finalists in the 2005 - 06 UEFA Cup .
Founder members of the Premier League in 1992 , Middlesbrough won the Football League Cup in 2004 , and were beaten finalists in the 2005 - 06 UEFA Cup .