Here's a depth chart that I compiled based on what I could gather from around the web in regards to who is going to be attending:
QB K. Faulkner
RB C. Hyde, M. Lattimore
FB T. Millard*
WR C. Jacobs
WR B. Ellington
TE A. Cleveland
LT L. Marquardt
LG F. Fonoti, B. Thomas*
C M. Martin
RG A. Netter
RT C. Bykowski
RDE K. Ramsey
NT M. Purcell
LDE
ROLB A. Lynch
MLB C. Borland
MLB S. Skov
LOLB M. Breslin
RCB D. Johnson, J. Ward*
LCB K. Acker, K. Reaser*
SS
FS J. McCray
P C. Schmidt
* denotes a player that is rehabbing and most likely won't participate.
UPDATE -- Here's a list of players that are there on a tryout basis:
RB Anthony Wilkerson (Stanford)
FB Patrick Su'a (Fresno State)
WR Kevin Cummings (Oregon State)
WR Jerry Rice Jr. (UNLV)
TE Kane Friel (Brigham Young)
TE Kevin Greene (USC)
TE Taylor Sloat (UC Davis)
NT Viliami Moala (Cal)
LB Colin Kelly (UC Davis)
LB Chase Thomas (Stanford)
CB Drayton Allen-Calhoun (Middle Tennessee State)
CB Cameron Fuller (New Mexico State)
S Courtney Avery (Michigan)
S A.J. Highsmith (Miami)
LS Jimmy Davenport (Faulkner)
[ Edited by 49er on May 23, 2014 at 2:05 PM ]