Education
Mathieu attended Street George"s High School in the Bahamas, graduating in 2001 as their "Most Outstanding Athlete".
Mathieu attended Street George"s High School in the Bahamas, graduating in 2001 as their "Most Outstanding Athlete".
He was part of the Bahamian silver medal-winning team in the men"s 4×400 metres relay at the 2008 Beijing Olympics, running second leg and recording a 44.0 split, and the gold medal winning team at the 2012 Summer Olympics. He was also a part of second place relay team at the 2007 World Championships. His personal bests are 20.16 seconds for the 200 m and 45.06 for the 400 m (the former being the Bahamian record mark).
He gained a sports scholarship to attend Southwestern Christian College in Texas, United States.
The following year he took the 400 m bronze medal at the 2003 Pan American Junior Athletics Championships. In 2004 he began studying economics at Texas Technical University and started competing for the Texas Technical Red Raiders under coach Wes Kittley.
In the 2005 indoor track and field season he was runner-up at the Big 12 Conference meet in the 400 m and 4 × 400 m relay. The 2006 indoor season was his last at Texas Technical: he set a 200 m personal best of 21.34 seconds and again reached the National Collegiate Athletic Association relay final.
He reached the senior international level at the 2007 World Championships and became a fixture in the Bahamian national team from then onwards.
At the 2008 Summer Olympics he reached the semi-finals of the 400 m and took the relay silver medal with a time of 2:58.03 minutes. At the 2009 CAC Championships he came sixth in the 400 m final. He was selected for the national team at the 2009 World Championships in Athletics, but disqualifications meant he was out of the first round of both events.
He performed better at the 2010 IAAF World Indoor Championships, reaching the semi-finals, but the team failed to finish the relay.
In 2011, a switch to focus on the 200 m event saw him have a career breakthrough. He represented Bahamas in the 200 m at the 2011 World Championships in Athletics, but failed to finish in his semi-final due to injury.
He came close to medal at the 2011 Pan American Games, where he was fourth behind Brazil"s Bruno de Barros. He opened his 2012 season in strong form.
Competing on the Brazilian Athletics Tour, he ran a Bahamian record of 20.16 seconds for the 200 m and set a personal best in the 400 m with a run 45.06 seconds.
He also equalled his 100 metres best with a time of 10.30 seconds.
Individually, he has won medals at the Central American and Caribbean Championships, taking the 400 m silver medal in 2008 and the 200 m gold in 2011. As a junior athlete, he won two relay medals in the under-20 section of the 2002 CAC Junior Championships. Moving up the age categories, he won a 400 m relay bronze medal at the 2006 NACAC Under-23 Championships in Athletics. He earned All-American honours by reaching the National Collegiate Athletic Association indoor relay final, then achieved the same feat in the outdoor season. He ran in the heats, both individually and in the relay, at the 2008 IAAF World Indoor Championships, then won two silver medals in the events at the 2008 Central American and Caribbean Championships. Outdoors, he was a silver medalist in the relay at the 2010 CAC Games and fourth in the relay at the 2010 Commonwealth Games. He ran a personal best of 20.38 seconds to win at the national championships then claimed the gold medal in the event at the 2011 Central American and Caribbean Championships in Athletics. He also won the relay, running with Avard Moncur and Ramon Miller. He also won gold at the 2012 London Olympics with the Bahamas 4 × 400 m team beating medal favorites United States of America with a national record. At the 2014 Commonwealth Games, he won a silver medal as part of the men"s 4 × 400 m team
