Originally drafted by the Saints with pick No. 75 in the 2012 National Draft, Pierce was delisted and re-drafted as a rookie at the end of 2017.
After breaking through for an AFL debut midway through 2016, Pierce fell down the ruck queue behind Billy Longer and Tom Hickey last year.
The Dandenong Stingrays product played 11 games for Sandringham in the VFL last year.
Draft History: Pick 75 2012 AFL Draft (St. Kilda)