Referee Joe McQuillan is the least popular man at Croke Park today (tweets)

Referee Joe McQuillan is not having a great game this afternoon, judging by the reaction on Twitter (unless you are a Dub...)

The Cavan whistler gave Dublin a first-half penalty that could have been adjudged to have happened outside the box and later denied Mayo's Aidan O'Shea a spot-kick after he was brought to ground. But he has received most ire for leaving his card in his pocket when Blues defender Cian O'Sullivan dragged Diarmuid O'Connor back by the shirt.   https://twitter.com/TheSundayGame/status/638004893480054785 https://twitter.com/NedzerB13/status/638006150923984897 https://twitter.com/hertz012/status/638004827944026114 https://twitter.com/Acadogan15/status/638005062334316544 https://twitter.com/AoibheannMcCaul/status/638005179615473664 https://twitter.com/ponyyelof/status/638004828447318016 https://twitter.com/stibhan/status/638004786625912832 https://twitter.com/Daithi1995/status/638004942595342336 https://twitter.com/daraghr10/status/638005178805944320 https://twitter.com/BrianBb91/status/638005752985223169 https://twitter.com/ProFiona/status/638005290982600704 https://twitter.com/ddparko/status/638005650165993473 https://twitter.com/AidanOc_/status/638006102769184768 https://twitter.com/Teaps15/status/638006155244118016 https://twitter.com/ianhbksher/status/638005508926914560