Rubuta ci gaba don wannan sakin layi - A gasar Olympics ta 2008 a Beijing, Reynisson ya cancanci a karo na biyu a cikin mita 100 na butterfly
, ta hanyar haskaka lokacin shigarwa na FINA B na 54.32 daga Mare Nostrum Monte Carlo Meet a Monaco. Reynisson ya kalubalanci wasu masu iyo bakwai a zagayen na uku, gami da 'yan wasan Olympics sau uku Jeremy Knowles na Bahamas da Camilo Becerra na Colombia. Ya wuce Becerra don ɗaukar matsayi na biyar ta hanyar kashi ɗaya cikin goma (0.10), ya rubuta mafi kyawun rayuwarsa na 54.17, kawai 0.15 na biyu da sauri fiye da lokacin shigarsa. Reynisson ya kasa ci gaba zuwa wasan kusa da na karshe, yayin da ya sanya na biyu da hamsin daga cikin masu iyo 66 a cikin zafin farko.