He was chosen as the first round pick (number 3 overall) in the 2007 AFL Draft by the Eagles, the team he had supported as a child.

He returned in 2009 and was awarded an AFL rising star nomination in round 16 against Port Adelaide, with a career-high 38 possession game.

[4][5] In August 2015, Masten was found guilty of biting Fremantle player Nick Suban by the AFL tribunal.

[9] On Australia Day in 2008, Masten was arrested for disorderly conduct after drunkenly punching a man to the ground.

Masten pleaded guilty to the disorderly conduct charge and was fined $750 and ordered to pay costs of $110 and received a spent conviction.