23 July 2021; Referee John Keenan appears to show the black card to Niall O'Leary, not pictured, before showing him a second yellow card, and then a red card, during the GAA Hurling All-Ireland Senior Championship Round 2 match between Clare and Cork at LIT Gaelic Grounds in Limerick. Photo by Piaras Ó Mídheach/Sportsfile