Braydon Coburn was born February 27, 1985 in Calgary, Alberta. The first round, eighth overall selection of the Atlanta Thrashers in the 2003 NHL Entry Draft, Coburn is a graduate of the WHL's Portland Winter Hawks.
A towering defenseman, Coburn played four full seasons in the WHL with Portland tallying 131 points (29-102-131). The 2003-04 winner of the WHL's Humanitarian Award, Coburn was also the WHL's Rookie of the Year in 2001-02 and a member of Canada's gold medal World Junior team in 2005.
In the spring of 2005, Coburn joined the AHL's Chicago Wolves for its run to the Calder Cup final against the eventual Cup champions from Philadelphia before making his NHL debut with Atlanta during the 2005-06 season. Despite making his NHL debut with the Thrashers, Coburn spent the majority of the season with the Chicago of the AHL.
In the 2006-07 season, Coburn appeared in 29 games with the Thrashers before being dealt to the Philadelphia Flyers for Alexei Zhitnik.