As of RIGHT NOW, these are the 50 players the Saints have retained:
QB (2) Drew Brees, Mark Brunell
HB (4) Pierre Thomas, Reggie Bush, Mike Bell, Lynell Hamilton
FB (1) Heath Evans
WR (5) Marques Colston, Lance Moore, Devery Henderson, Robert Meachem, Rod Harper
TE (3) Jeremy Shockey, Buck Ortega, Darnell Dinkins
T (4) Jammal Brown, Jon Stinchcomb, Jermon Bushrod, Zach Strief
G (3) Jahri Evans, Carl Nicks, Jamar Nesbit
C (2) Jonathan Goodwin, Nick Leckey
E (3) Anthony Hargrove, Bobby McCray, Jeff Charleston
DT (3) Sedrick Ellis, Kendrick Clancy, Remi Ayodele
OLB (5) Scott Fujita, Scott Shanle, Troy Evans, Jo-Lonn Dunbar, Jonathan Casillas
MLB (2) Jonathan Vilma, Marvin Mitchell
CB (5) Tracy Porter, Jabari Greer, Randall Gay, Malcolm Jenkins, Leigh Torrence
S (5) Darren Sharper, Roman Harper, Usama Young, Pierson Prioleau, Chris Reis
K (1) John Carney
P (1) Thomas Morstead
LS (1) Jason Kyle
This means you can expect the Saints to sign 3 players in the very near future to fill out their roster. Keep in mind Will Smith, Charles Grant and Garrett Hartley are currently awaiting suspensions and they fill out the 53 man roster. It's possible the Saints could bring back some of the recently released players once they officially go on suspension.