Head coach Leo Cullen, right, and Jamison Gibson-Park before a Leinster Rugby captain's run at Croke Park in Dublin. Photo by Seb Daly/Sportsfile

Head coach Leo Cullen, right, and Jamison Gibson-Park before a Leinster Rugby captain’s run at Croke Park in Dublin. Photo by Seb Daly/Sportsfile

This morning, Leo Cullen stepped up in front of a room full of players to review a game that most of them had no part of.

The majority of the culprits for Leinster’s worst derby day in more than a decade had already traded their blue gear for green and were focusing on the All Blacks on Saturday week.