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He returned to competition in 2006 but finished the season with unimpressive bests of 10.31 and 20.54.
He returned to competition in 2006 but finished the season with unimpressive bests of 10.31 and 20.54.
This earned him qualification into the 2004 Summer Olympics, but he was withdrawn from the competition after his sample from the national championships tested positive for banned substances. After his B sample also tested positive for testosterone, he was banned from competition for two years and his results between mid-2004 and 2005 were removed from the record. The following year was much more successful.
He competed at the 2007 World Championships in Athletics as a heats runner for the Jamaican silver medal-winning 4×100 metres relay team
After an uneventful 2008, Mullings returned to form in 2009. He set new personal bests in both sprints in July, running 20.01 seconds over 200 m in Rethymno, and 10.01 seconds over 100 m at the Golden Gala.
In 2011, he broke the 10 second barrier for the first time at age 28, and by the end of the year had run under 10 seconds seven times. However, on 11 August 2011, it was reported that Mullings had tested positive for the drug Furosemide, a masking agent.
The positive test was recorded at the Jamaican national trials in June where he finished third in the men"s 100-metre final.
On 22 November the Jamaican Anti-Doping Disciplinary Panel handed him a lifetime ban from athletics. They voted unanimously on the decision. All information taken from IAAF profile.