He first made state selection for New South Wales in the 2005 senior eight contesting the King's Cup at the Interstate Regatta within the Australian Rowing Championships.

[3] The following year he again raced a coxed pair at the World Championships in Linz 2008 and rowed to a bronze medal with Nick Baxter and steered by Hugh Rawlinson.

[3] In 2009 he was selected to the Australian men's senior eight and in the seven seat at the 2009 World Championships they missed the A final and finished in seventh place overall.

[5] From 2013 Pragnell's King's Cup teammate Spencer Turrin was the lynchpin in variations of the Australian men's coxless four who ultimately built a successful campaign to become 2017 World Champions.

[6] In 2016 Pragnell was in the Australian men's eight who were unsuccessful in attempting to qualify for the 2016 Rio Olympics at the final FISA qualification regatta.