As pointed out by mmmmm, with such a short training camp, experience in the system will be a plus. Here's the guys who are either under their control, or played on the team last year:
1 - Rondo, Arroyo, Avery
2 - Ray, Delonte, Wafer, Moore
3 - Paul, Marquis, Sasha
4 - KG, Green, Jajuan
5 - JO, Murphy
It's actually not a bad roster, but as usual there's not enough depth at the 4/5. To me, the key would be Troy Murphy. If he could legitimately back up Jermaine (who would need to stay healthy) then this is a team that could compete, but would exit the playoffs before the ECF, most likely.