Simpkin was recruited with the 29th pick in the 2009 rookie draft from the Geelong Falcons, and was promoted to St Kilda's senior list in August 2010.
[1] He made his AFL debut in Round 11 of the 2011 AFL season against Collingwood.[2] He was delisted at the conclusion of the 2015 season.[3]
Personal life
His brother Jonathan is a premiership player with Hawthorn in 2013 & Box Hill in 2013.[4]