Taylor also has a 400-meter dash best of 44.05 seconds, ranking him as the joint 29th performer of all time, superior to any other athlete who has made a serious effort in the 400 metres hurdles.

Taylor made his debut in a major international meet at the 1999 World Championships, where he finished third in his heat in 400 m hurdles, but ran a third leg at the gold medal-winning US 4x400 m relay team.

On August 2, 2008, the International Olympic Committee stripped the gold medal from the U.S. men's 4x400-meter relay team, after Antonio Pettigrew admitted using a banned substance.

[1] Taylor was eliminated in the semifinals of the 2001 World Championships in 400 m hurdles while struggling with a sinus infection and flu, but won a gold as a member of US 4x400 m relay team.

[2] He fell behind Kerron Clement and Bershawn Jackson in the hurdles rankings that year, but in the 2010 IAAF Diamond League he managed top three finishes in Lausanne, Monaco and Stockholm.

[3] He came third in the 400 m hurdles at the 2011 USA Outdoor Track and Field Championships with a season's best run of 47.94 seconds, gaining a place on the national team.

[4] He performed well in the relay, however, taking the United States to victory in a time of 2:59.31 minutes alongside Greg Nixon, Bershawn Jackson and LaShawn Merritt.

[6] In the 4x400m relay finals, Taylor ran the anchor leg and was given the lead but was chased down by the Bahamas, so the USA team won the silver medal.

[10] SafeSport officially noted Taylor's violation that same day, and declared him ineligible,[11] with the announced reason being "Criminal Disposition – involving minor".