|Born||October 20, 1979 (age 39)|
The Nigerian team finished second behind the US team, which has later been formally disqualified from the 4x400 meters relay event at the 2000 Olympics by the International Olympic Committee, due to one of the team members' use of illegal performance-enhancing drugs while competing in Sydney.
On 21 July 2012, the 2000 Olympics 4 × 400 m relay medals were reallocated after the USA team was stripped of the gold medal, meaning Gadzama and Nigeria are the gold medalists.
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