Falelavaki first represented France at the 2008 Summer Paralympics in Beijing, entering the shot put and javelin throw events (F44). In the shot he finished eighth, and in the javelin eleventh. Four years later he took part in the 2012 Paralympics in London, this time with his focus solely on the javelin. His third round throw of 58.21 set a new European record and gave Falelavaki the silver medal.