GAA Slick Mayo put an end of Donegal’s U-21B All-Ireland hurling championship hopes by Alan Foley August 9, 2015 DONEGAL’s All-Ireland Bord Gais Energy U-21B hurling campaign fell by the wayside when they went down to Mayo at O’Donnell Park on Saturday. Donegal 1-6 Mayo 1-14 Sean Regan was…