Bolded are the ones only worth keeping IMO. Possibly Wallace as well.By my accounts these are the VFL players not yet accounted for.
51. Michael Still
52. Lachie Wallace
53. Jack Hellier (ACL so I'm not sure what we'll do there)
63. Gus Borthwick
64. Jesse Wallin
69. Jack Blair.
71. Angelo Rambaldi
72. Will Knight
74. Jackson Viola
75. Marcus Alessi
76. Adrian Indovino
DEVELOPMENT
Trent Cody
Max Kelly
Theo Rosenthal
REHAB
Rourke Fisher
Josh Turner
That is just going by this list. I have no idea how up to date it was.
http://www.collingwoodfc.com.au/season/vfl/vfl-players-2016