 In 2011, Ó Sé's first championship match was against Tipperary in the Munster senior football championship quarter final.The game contained a number of talking points, but the main one occurred when Ó Sé was involved in an off-the-ball incident with Hugh Coghlan from Tipperary in front of the stand in the 33rd minute.The linesman witnessed Ó Sé strike Coghlan, leaving match official Maurice Condon with no option but to red card Ó Sé.