Marcus Smart cannot shoot the basketball. In fact, he’s one of the worst shooters I have ever seen.

But he’s still key to the Celtics success this year and in the future.

Smart’s stats are ugly. He is shooting .342 percent from the field and .251 percent from the three-point line. In fact — according to — Smart is the worst three-point shooter in NBA history this season.

Despite those numbers, I want him out on the floor, and so does Brad Stevens. Smart is averaging 27 minutes a game, tied for fourth on the team. That shows you how much the coach values him.

Smart does so many things well that don’t show up in box score. His toughness sets a tone for the Celtics. Smart is a big strong guard who uses his body well and is one of the best on-the-ball defenders in the game.

He rebounds as well as any guard in the game and they should just retire the Tommy Point and give it to Smart every night. He missed 18 games this year with a knee injury, the team Celtics were 10-8 in his absence. When Smart plays, the team is 32-22.

Smart will never turn into Steph Curry, but he is athletic enough and has decent enough form that — with some hard work — he can turn himself into an average shooter. Add in the other tangibles and intangibles that he brings to the team and there can by no denying that Smart will be a cornerstone on the next great Celtic team.