So to the best of my knowledge - I'm sure there will be a mistake or two that somebody will kindly correct me on - here is a list of players NOT eligible for the Practice Squad:
QB: Tom Brady, Brian Hoyer
RB: Laurence Maroney, Kevin Faulk, Fred Taylor, Sammy Morris, BJGE
WR: Randy Moss, Wes Welker, Julian Edelman, Sam Aiken, Matt Slater
TE: Alge Crumpler
OL: Matt Light, Sebastian Vollmer, Logan Mankins, Stephen Neal, Dan Koppen, Nick Kaczur, Mark LeVoir, Dan Connolly, Quinn Ojinnaka, Eric Ghiaciuc
DL: Vince Wilfork, Mike Wright, Gerard Warren, Damione Lewis, Myron Pryor, Ron Brace
OLB: Tully Banta-Cain, Derrick Burgess, Pierre Woods, Rob Ninkovich, Marques Murrell
ILB: Jerod Mayo, Gary Guyton, Eric Alexander
S: Brandon Meriweather, Pat Chung, James Sanders, Brandon McGowan, Josh Barrett, Bret Lockett
CB: Leigh Bodden, Darius Butler, Jonathan Wilhite, Kyle Arrington
S/T: Stephen Gostkowski, Jake Ingram
And below is a list of players that ARE eligible for the Practice Squad:
QB: Zac Robinson
RB: Thomas Clayton (? - spent '07 and '08 on SF's PS); Chris Taylor (? - '06 on PS, '07 on IR, 6 games in '08 then IR, IR in '09)
WR: Brandon Tate, Taylor Price, Buddy Farnham, Darnell Jenkins (? - 2 years on PS), Rod Owens
TE: Rob Gronkowski, Aaron Hernandez, Rob Myers, Carson Butler
OL: Ted Larsen, George Bussey, Rich Ohrnberger, Thomas Welch
DL: Brandon Deaderick, Kyle Love, Darryl Richard (is he still on the roster?)
OLB: Jermaine Cunningham
ILB: Brandon Spikes, Tyrone McKenzie, Thomas Williams, Dane Fletcher
S: Sergio Brown
CB: Devin McCourty, Terrence Wheatley, DeAngelo Willingham, Terrence Johnson, Ross Ventrone
S/T: Zoltan Mesko
Eliminate the players that would either not be cut, or would be signed by another team if they were, and the current list of Practice Squad candidates looks like this; keep in mind some of these players could still make the 53-man roster, and players currently on other teams could end up on the Practice Squad.
QB: Zac Robinson
RB: Thomas Clayton, Chris Taylor
WR: Buddy Farnham, Darnell Jenkins, Rod Owens
TE: Rob Myers, Carson Butler
OL: Ted Larsen, George Bussey, Rich Ohrnberger, Thomas Welch
DL: Brandon Deaderick, Kyle Love, Darryl Richard
ILB: Thomas Williams, Dane Fletcher
S: Sergio Brown
CB: DeAngelo Willingham, Terrence Johnson, Ross Ventrone
Perhaps somebody can enlighten me in regards to Clayton, Taylor and Jenkins. I don't exactly understand the rule about two years versus three years on a practice squad, and a team never having less than 53 players is applied.