Andrés Bayron Silva Lemos (born 27 March 1986 in Tacuarembó) is a Uruguayan track athlete. He competed in the combined events on the youth and junior levels, but has since specialized in the 400 metres and 400 metres hurdles.
Silva participated in the 400 metres at the 2004 and 2008 Olympics, and 400 metres hurdles at the 2012 and 2016 Summer Olympics.
He was Uruguay's flagbearer at the 2007 Pan American Games.
He tested positive for 6-oxo-androstene in an out-of-competition test in June 2015 and was banned for a period of six months, which included his missing the 2015 World Championships in Athletics.Positive cases in athletics Sanctioned according to information received by the IAAF as of 23 January 2016. IAAF (January 2016). Retrieved on 2016-01-27.
Personal bests Event Result Venue DateOutdoor 100 m 10.40 s (wind: +1.6 m/s) San Carlos, Uruguay 29 March 2006 200 m 20.80 s (wind: -0.3 m/s) Montevideo, Uruguay 2 April 2006 400 m 45.02 s Fortaleza, Brazil 17 May 2006 800 m 1:50.98 min Santiago, Chile 26 April 2003 1500 m 4:14.85 min Rosario, Argentina 5 June 2005 110 m hurdles 14.93 s (wind: -0.2 m/s) Montevideo, Uruguay 16 April 2004 400 m hurdles 48.65 s São Paulo, Brazil 2 August 2014 High jump 1.91 m Rosario, Argentina 4 June 2005 Pole vault 4.45 m Rosario, Argentina 9 October 2004 Long jump 7.59 m (wind: -0.9 m/s) A Cochabamba, Bolivia 4 June 2006 Javelin throw 52.02 m Windsor, Canada 30 July 2005Indoor 400 m 47.50 s Moscow, Russia 10 March 2006
Competition record Representing 2002World Junior ChampionshipsKingston, Jamaica26th (h)400 m48.14South American Junior Championships / South American GamesBelém, Brazil5th200 m21.63 (+1.1 m/s)6th3rd400 m47.50South American Youth ChampionshipsAsunción, Paraguay2nd110 m hurdles14.26 s (-1.9 m/s)1stOctathlon5928 pts4th800m Medley relay(100m x 100m x 200m x 400m)1:58.062003South American Junior ChampionshipsGuayaquil, Ecuador3rd200 m21.451st400 m46.54South American ChampionshipsBarquisimeto, Venezuela4th400 m46.23World Youth ChampionshipsSherbrooke, Canada1stOctathlon6456 pts 2004South American U23 ChampionshipsBarquisimeto, Venezuela1st400 m45.80 (NR)World Junior ChampionshipsGrosseto, Italy5thDecathlon (junior)7542 ptsIbero-American ChampionshipsHuelva, Spain6th400 m46.63Olympic GamesAthens, Greece42nd (h)400 m46.482005South American ChampionshipsCali, Colombia1st400 m45.38Pan American Junior ChampionshipsWindsor, Canada1stDecathlon7641 ptsSouth American Junior ChampionshipsRosario, Argentina2nd400 m47.846th4 × 100 m relay42.425th4 × 400 m relay3:19.352006World Indoor ChampionshipsMoscow, Russia18th (h)400 m47.50 (i)Ibero-American ChampionshipsPonce, Puerto Rico1st400 m45.35South American U23 Championships / South American GamesBuenos Aires, Argentina1st400 m46.691st400 m hurdles50.46 (NR)2007South American ChampionshipsSão Paulo, Brazil1st400 m45.89Pan American GamesRio de Janeiro, Brazil20th (h)400 m47.7312th (h)400 m hurdles50.60World ChampionshipsOsaka, Japan43rd (h)400 m46.792008World Indoor ChampionshipsValencia, Spain18th (h)400 m47.54Olympic GamesBeijing, China41st (h)400 m46.34South American U23 ChampionshipsLima, Peru1st400 m46.731st400 m hurdles51.332009South American ChampionshipsLima, Peru1st400 m46.061st400 m hurdles50.28World ChampionshipsBerlin, Germany40th (h)400 m46.8613th (sf)400 m hurdles49.34 (NR)2010World Indoor ChampionshipsDoha, Qatar24th (h)400 m49.09Ibero-American ChampionshipsSan Fernando, Spain2nd400 m hurdles49.582011South American ChampionshipsBuenos Aires, Argentina1st400 m hurdles49.94World ChampionshipsDaegu, South Korea16th (h)400 m hurdles49.63Pan American GamesGuadalajara, Mexico –400 m hurdlesDNF2012World Indoor ChampionshipsIstanbul, Turkey29th (h)400 m51.93Ibero-American ChampionshipsBarquisimeto, Venezuela7th400 m hurdles51.68Olympic GamesLondon, United Kingdom45th (h)400 m hurdles53.382013South American ChampionshipsCartagena, Colombia2nd400 m hurdles50.52World ChampionshipsMoscow, Russia28th (h)400 m hurdles50.482014South American GamesSantiago, Chile1st400 m hurdles49.57Ibero-American ChampionshipsSão Paulo, Brazil1st400 m hurdles48.65 (CR, NR)Pan American Sports FestivalMexico City, Mexico3rd400m hurdles49.08 A2015South American ChampionshipsLima, Peru1st400 m hurdles49.432016Ibero-American ChampionshipsRio de Janeiro, Brazil1st400 m hurdles49.48Olympic GamesRio de Janeiro, Brazil20th (sf)400 m hurdles49.752017South American ChampionshipsAsunción, Paraguay4th400 m hurdles50.582018South American GamesCochabamba, Bolivia4th400 m hurdles50.292019South American ChampionshipsLima, Peru4th400 m hurdles50.732021South American ChampionshipsGuayaquil, Ecuador3rd400 m hurdles51.42
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