There's room on the roster for everyone. With the Spurs being in luxury tax territory this year, they're going to have to go bargain basement to fill out the roster, and that means going young. Here's how the roster plays out:
Red indicates a player that's not yet on the roster.
Parker - starting PG,
Ginobili - starting SG (whether he starts or not)
Jefferson - starting SF
Duncan - starting PF
FA Center - starting C
Hill - backup PG
Mason - backup SG
Mcclinton - SG role player, shooting, defense
Blair - PF/C role player, rebounding, defense size
Mahinmi - PF/C role player, rebounding, defense length
Bonner - PF/C role player, shooting, defense
Hairston - SG/SF role player, defense, penetration
Gist - SF/PF role player, shooting, rebounding, defense
Marcus Williams - Trade Bait/Austin
This gives the Spurs a heck of a versatile and athletic roster with lots of ability to defend and rebound around a core of really good stars. You also have an above average defender at every position, and several guys that play two positions to allow the team to go big or small depending on the situation. There's also room for another minimum vet, Finley if he decides to stay or for a call-up from the D League.