Gareth Southgate is one of Middlesbrough’s greatest-ever centre-backs and a true legend of the club. Gareth Southgate enjoyed an illustrious playing career at Middlesbrough and will go down as arguably the club’s best captain of all time. As well as being a key figure during Boro’s most successful spell in the club’s history, Southgate’s career also includes stints in management. Here is absolutely everything you need to know about the Middlesbrough legend. READ MORE: Middlesbrough’s best academy graduates of all timeHow old is Gareth Southgate?Gareth Southgate was born on September 3rd, 1970….