It's been his free throw shooting, passing, posting up and insane defense which has him knocking on the all-star door.
Celtics blogger Chambers wrote in January:
Marcus Smart has shot 94% (31/33) from free throw line in last 12 games.
Some think he will always be a lousy shooter, but I'm not so sure. 31 out of 33 for even free throws shows an ability to shoot. He has also had some rare games where he mysteriously shot at a very high rate, maybe against Oklahoma a couple years ago.
I think Marcus deserves at least one more Summer to work on it before we assume he's another Rondo.
I'd say both Marcus and Jaylen have equal odds at becoming future All-Stars and are in the process of forming the core Danny is machinating.
At some point, Jaylen is going to go off on a serious tear in a game. That's brewing under the surface.
Marcus and Jaylen are especially fun to watch with Avery injured. It's just obvious they need to step it up. Olynyk is starting to sense the team needs him. I hope when Avery comes back, he is eased into it, especially if he's rusty.
The team is getting better and better. We seem relatively healthy with only Bradley and Jerebko as game time decisions.