We have a long way to go before training camp, but it is never too early to start looking at how to cut down the roster to 15. (Ok, I know Jeff Green isn't officially signed yet - and no, I don't have any updates, sorry). Joseph seemed to have a solid summer league and was drafted so he's probably got the upper hand on the non-guaranteed guys.
My prediction? Christmas has the inside track after an eyebrow-raising summer in which he showed a lot of versatility. He wasn't even supposed to stay with the Celtics for the Las Vegas portion of the 10-game summer slate, but he stuck around knowing a camp invite could be on the horizon and now he'll get his first real chance to make an NBA roster. Smith's shooting is enticing when those 3-pointers are falling, but Christmas displayed a well-rounded game and has some additional size that could make him the more attractive option. Smith really has to kick down the door at camp in order to wrestle away a spot, while even Christmas still has a little something to prove in order to encourage the Celtics to carry a 15th body.
Hard to argue with Christmas and honestly, why would you want to? That's the kind of name that gives me the gift of creative headlines all year long.