Donegal’s All Ireland quarter final prospects have been dealt a severe blow with Dermot “Brick” Molloy ruled out with a knee injury. Molloy picked up the injury playing for Naomh Conaill, in a U21 club championship game on Tuesday night against St. Eunan’s in the O’Donnell Park. A scan on Wednesday revealed damage to his knee and he has been told by the medics that he will be out for at least six weeks. An influential figure coming off the bench in all four championship games to date, he scored the clinching goal against Tyrone in the Ulster semi final. His absence is a setback and will reduce Jim Mc Guinness’ options.