Which football team did Paul Gascoigne make his only English League Cup Final appearance with?

Paul John Gascoigne (born 27 May 1967), nicknamed Gazza, is an English former professional footballer who played as an attacking midfielder. Regarded as one of the best playmakers of his generation and one of the best English footballers of all time, Gascoigne is described by the National Football Museum as "widely recognised as the most naturally talented English footballer of his generation". Gascoigne was immensely popular during his playing career, with television broadcaster Terry Wogan calling him "probably the most popular man in Britain today" in September 1990, and public interest in and adoration for him came to be known as "Gazzamania".

Gascoigne left Glasgow Rangers to join Middlesbrough for £3.45 million in March 1998, where former England teammate Bryan Robson was manager. His first match was the 1998 Football League Cup Final defeat to Chelsea at Wembley, where he came on as a substitute. This was his only ever appearance in an English league Cup Final. He played seven games in the First Division, helping "Boro" into the Premier League as runners-up to Nottingham Forest at the end of the 1997–98 season.