Forker made his inter-county debut against
Down in the
2012 Dr McKenna Cup. He made his championship debut in the
2012 Ulster SFC quarter-final loss to
Tyrone. Armagh manager
Kieran McGeeney appointed Forker as team captain in 2024. Thus, Forker was captain when Armagh won the
2024 All-Ireland Senior Football Championship, with a 1–11 to 0–13 win over
Galway in the
final. He won an
All Star at the end of the 2024 season. At the time Armagh won the
2024 All-Ireland SFC, Forker was vice-principal of
Our Lady's Primary School, Tullsaran, and he brought the
Sam Maguire Cup there to show the children who were under his care. Live on television, in the
2025 National League meeting of Armagh and
Donegal at
MacCumhaill Park, Forker
headbutted
Michael Murphy in the 44th minute. This was within moments of Murphy's reintroduction (as a substitute) to inter-county football, and referee
Sean Hurson sent Forker off. Forker's headbutt of Michael Murphy was widely compared to
Zinedine Zidane's headbutt during the 2006 FIFA World Cup final, though — unlike Zidane's opponent — Murphy stood firm and did not even move. ==Honours==