http://www.espn.com/nba/player/splits/_/id/2990992/marcus-smart
By Result GP MIN FGM-FGA FG% 3PM-3PA 3P% FTM-FTA FT% OR DR REB AST BLK STL PF TO PTS
In wins 20 29.4 2.6-7.8 .327 0.9-3.4 .250 2.2-2.8 .768 0.7 3.4 4.1 4.6 0.5 1.3 2.2 2.1 8.1
In losses 13 30.5 4.5-11.2 .400 1.7-5.1 .333 1.4-2.0 .692 1.2 2.2 3.3 4.0 0.2 1.2 2.5 1.5 12.0
Sorry don't know how to organize this better. He is a 33% shooter in wins, but he is a 40% shooter in losses. His 3 percentage jump 8% from 25 to 33. His points go up 4 ppg. His TO go down .6.
Does this speak to his psyche a little bit? When the game is tight and our team is not playing up to its competition, he takes the challenge and plays better, but when the team is competing and playing well, he plays looser and less focused?
What else could this say?
The most interesting stat to me is that he attempts 7.8 FG in wins and 11.2 FG in losses, the more he shoots the worse off the team is.
Correlation =/= causation
Eh, you don't need a PhD in statistics to know that letting a historically bad offensive player take double digit shots is going to be bad for your winning percentage.
I think you have it backwards. It's not that him shooting more makes us worse, it's that when we are worse he has to shoot more.
His role has been forcefully expanded during injuries to crowder smart and Bradley.
Good points by IlikeSports17. Correlation does not imply causation should be in bold letters at the top of every thread using stats.
(As a sidenote, I do not see the problem with Smart averaging 11.2 FGs in losses, given that his FG% is at 40. And 5.1 of these shots are 3s which normally have a lower % anyway. I mean, getting a higher FG% with FGA is sthg he should be praised not criticized for)
Whatever was the cause of that pattern (assuming it wasn't just a coincidence), it stopped today. 7/10 FG, 3/3 FT and a W against NOP 
https://www.teamrankings.com/nba/stat/opponent-points-from-3-pointers
Yeah, as long as we can play the Pelicans or Sacramento (Ranked 29th and 30th respectively in Team Opponents Points scored by 3 pointers) every night he should be fine.
Far more important than total points, the pelicans rank 11th in the league in opposing 3pt %. Opposing teams make 35.7% of 3 point attempts. Last night Marcus Smart made 83% including a 35 footer with the shot clock expiring.
There are plenty of legit ways to criticize Smart. This isn't one of them.
Thanks for bringing this up! This is a common misconception and I think this could be very helpful for making more informed basketball fans!
One stat is not "far more important" than the other... they're related.
The Pelican's aren't ranked 11th in the NBA in 3% against because they're a "good" team at defending the perimeter, they're ranked 11th in 3% against because of the sheer volume of threes teams are taking against them. How many threes are teams attempting against them?
Opposing teams attempt a whopping 30.3 shots from 3-point land per game against the Pelicans. The Pelican's are #1 in the NBA in 3 pointers attempted against this season.
While they may be "holding" opponents to 35.7% 3 point shooting, the league average for 3% is 35.8% this year so what you're seeing is a regression to the mean as teams attempt the highest number of threes against the Pelicans of any team in the NBA.
It's not a coincidence that tonight as I write this Charlotte and Indiana are the #2 and #3 teams in volume of 3 pointers attempted against and both rank in the top ten in defensive 3%.
So while the casual fan might look at their 3% against and say, "Aha! Those teams are GREAT at defending the three." You can say now say, "No they're not, that's just how teams are choosing to attack them and those teams' shooting percentages are regressing to the mean."