In the 2013–14 UEFA Europa League first qualifying round, O'Brien scored his first goal for the Saints on his 70th appearance when he scored the equaliser in the first leg against VMFD Žalgiris to make it 2–2 in the LFF Stadium in Vilnius, Lithuania.
stadium | Wembley Stadium | Yankee Stadium | Twickenham Stadium | Shea Stadium | Wembley Stadium (1923) | Olympic Stadium | Memorial Stadium | Millennium Stadium | Chicago Stadium | Docklands Stadium | National Stadium | Headingley Stadium | M&T Bank Stadium | Giants Stadium | Dodger Stadium | Yankee Stadium (1923) | Sydney Football Stadium | Rose Bowl (stadium) | Reliant Stadium | Emirates Stadium | Busch Stadium | Raymond James Stadium | MetLife Stadium | Ellis Park Stadium | Cape Town Stadium | Veterans Stadium | Ibrox Stadium | Arrowhead Stadium | Yokohama Stadium |