There is a few spots here where a player can be dropped like FB, TE, etc. I don't even have Hayden listed and that makes 54. Injuries of course will tweak the roster.
QB - Cutler, McCown, Blanchard
RB - Forte, Bush, Allen, Fiametta
TE - Bennett, Maneri, Onobun
OT - Bushrod, Webb, Scott, Mills
OG - Long, Brown, Slauson, Britton, Garza
WR - Marshall, Jeffery, Bennett, Aromoshadu, Anderson, Wilson
K - Gould
LS - Mannelly
KR/PR - Hester
P - Podlesh or Way
CB - Tillman, Jennings, Frey, Bowman, McManis
S - Wright, Conte, Steltz, Hardin, Walters
DE - Peppers, McClellin, Wooton, Washington, Ozougwu
DT - Melton, Paea, Collins, Minter
LB - Briggs, Bostic, Williams, Greene, Anderson