Blakely, who is yet to make his senior debut after being taken with pick No. 34 in the 2014 National Draft, will remain with the club until the end of the 2017 season after earning a contract extension with some impressive form for Peel Thunder in the WAFL.
Young forward Matt Taberner has also signed on after cementing his place in the side this season.
The 22-year-old was taken with pick No. 11 in the 2012 Rookie Draft and has played 26 games since making his debut in round 13, 2013.