Dean Horace Griffiths (born 27 January 1980) is a male hurdler from Jamaica, who represented his native country at the 2004 Summer Olympics in Athens, Greece. He set his personal best (48.55) while winning the men's 400m hurdles at the NCAA Championship on 13 June 2003 in Sacramento, California and help Auburn University to a 2nd-place team finish. Also, in 2003 Griffiths was rank seventh best in the world over 400m hurdles and place 5th at the World Athletic Finals in Monaco.

Griffiths was coached by Henry Rolle

Achievements Representing 1999CARIFTA Games (U20)Fort-de-France, Martinique 2nd400m hurdles52.89Pan American Junior ChampionshipsTampa, United States4th400m hurdles51.872002NACAC U-25 ChampionshipsSan Antonio, Texas, United States3rd400m hurdles50.062nd4 × 400 m relay3:05.192003Pan American Games Santo Domingo, Dominican Republic 3rd400m hurdles49.35World Championships Paris, France9th (sf)400m hurdles48.642004Summer OlympicsAthens, Greece21st (sf)400m hurdles49.512005Central American and Caribbean ChampionshipsNassau, The Bahamas1st400m hurdles48.89World ChampionshipsHelsinki, Finland11th (sf)400m hurdles48.892006Commonwealth GamesMelbourne, Australia6th400m hurdles49.852007Pan American Games Rio de Janeiro, Brazil5th400m hurdles49.30

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