Career
Costello emigrated to London in 2011 where he linked up with the London senior hurling team In 2012 Costello was named the Christy Ring Hurler of the Year in addition to being awarded a Grade Point Average All-Star for his contribution to the London Christy Ring winning team At club level Costello is a two-time county senior championship medalist with Saint Gabriel"son
He previously played with Abbeyknockmoy.