Curreen represented Samoa at the 2008 Summer Olympics in Beijing, where he competed for the men's 800 metres. He ran in the fifth heat against six other athletes, including Sudan's Ismail Ahmed Ismail, who eventually won the silver medal in the final. He finished the race in sixth place by three hundredths of a second (0.03) behind South Africa's Samson Ngoepe, with a national record and personal best time of 1:47.45. Curreen, however, failed to advance into the semi-finals, as he placed twenty-ninth overall, and was ranked farther below two mandatory slots for the next round.