Racing Post's David Jennings is joined by former Meath goalkeeper Paddy O'Rourke, former Kilkenny attacking ace Aidan Fogarty and Paddy Power's Paddy Aherne for a preview of the big games this weekend, including Mayo v Roscommon in the Connacht SFC Semi-Final and Galway v Wexford in the Leinster SHC Round 3.