Following the retirement of Ben McGlynn on Thursday afternoon, Sydney has announced two further list changes.
Derrikx was recruited as a delisted free agent in 2013 and played 12 games for Sydney, following two games in three seasons with Richmond.
Galloway was recruited as a category B rookie in 2015 and did not play a senior game for the Swans.
“Both Tom and Kyle have worked hard during their time at our football club and represented the Swans in the NEAFL Grand Final,” Sydney’s Head of Football Tom Harley said.
“Tom has been a very popular member of the squad since coming across from Richmond and gave his all for the team.
“We extend our thanks to both players and wish them all the very best for the future.”