Owen Doyle: Peter O’Mahony’s act of thuggery deserves tough sanction
Cardiff game left such a bad taste after stirring encounters on Saturday

Referee Wayne Barnes shows Ireland flanker Peter O’Mahony a red card during the Six nations game against Wales at the Principality Stadium in Cardiff. Photograph: David Rogers/Getty Images
Jotting down a few words on Saturday evening, I noted how enjoyable and exciting the rugby had been.
By 5pm on Sunday all had changed, utterly. Cardiff was ugly.