He made his debut against Hawthorn in Round 11 of the 2008 AFL season.

Bellchambers, along with 33 other Essendon players, was found guilty of using a banned performance-enhancing substance, thymosin beta-4, as part of Essendon's sports supplements program during the 2012 season.

He and his team-mates were initially found not guilty in March 2015 by the AFL Anti-Doping Tribunal,[1] but a guilty verdict was returned in January 2016 after an appeal by the World Anti-Doping Agency.

He was suspended for two years which, with backdating, ended in November 2016; as a result, he served approximately fourteen months of his suspension and missed the entire 2016 AFL season.

On 24/05/23 Bellchambers made his professional boxing debut Vs Cameron Mooney in Melbourne, Bellchambers won by KO in the 3rd round.