At what weight class did boxer Barry McGuigan become world champion?

Finbar Patrick "Barry" McGuigan (born 28 February 1961) is an Irish boxing promoter and former professional boxer. Born in Clones, County Monaghan, McGuigan was nicknamed "The Clones Cyclone" and held the World Boxing Association (WBA) and lineal featherweight titles from 1985 to 1986. At regional level he also held the British and European featherweight titles between 1983 and 1985. In 1985, He was inducted into the International Boxing Hall of Fame.

As an amateur, McGuigan represented Northern Ireland in the Commonwealth Games at Edmonton in 1978 and represented Ireland at the 1980 Summer Olympics in Moscow. He became a UK citizen so that he could compete for British titles.

During his professional career, McGuigan fought at a number of venues in Ireland and Britain. He attracted an enormous following in the mid-1980s, particularly to the King's Hall in Belfast which he regularly filled to capacity. McGuigan is a Roman Catholic, and at a time when Catholics and Protestants were clashing during The Troubles, he married a Protestant, Sandra Mealiff. As of 2010, they remain married after over three decades.

Featherweight is a weight class in the combat sports of boxing, kickboxing, mixed martial arts, and Greco-Roman wrestling. A featherweight boxer weighs in at a limit of 126 pounds (57 kg).