On 20 May 2012 he won Lithuanian Football Federation Cup with Žalgiris Vilnius defeating previous two season cup winner Ekranas 3–1 after penalty shootout.
Vilnius | Vilnius University | VMFD Žalgiris Vilnius | St. Nicholas Orthodox Church, Vilnius | Žalgiris Kaunas | Žalgiris | Vilnius Voivodeship | Vilnius University Faculty of Communication | Vilnius TV Tower | Vilnius railway station | Vilnius city municipality | Vilnius Cathedral | Vilnius Castle Complex | St. Peter and St. Paul's Church, Vilnius | History of Vilnius | Café de Paris (Vilnius) | Botanical Garden of Vilnius University |
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.