Francis, Marbury, and possibly Marshall will be gone before the season starts if nobody trades for them. Marshall might last until midseason of those 3 though. Bobby Jackson is the largest expiring contract the Rockets have, there is no way they are buying him out IMO. Brevin Knight just got traded for I don't see Utah buying him out if he is even a passibly servicable backup to Williams. Mourning is fairly adamant about staying in Miami if he comes back and I'm sure that is his preference.