Also on the cover of Slam magazine today too:
https://www.slamonline.com/the-magazine/boston-celtics-cover-slam-226/

Cool cover for sure! Lol at Smart being the only one without a basketball in his hands 
If Marcus wanted a ball I am sure he would simply steal all four of the other basketballs from his teammates. 😄
Did Brad ever put those 5 together on the floor at least once?
Hasn't really had the chance unfortunately.
It looks to me like all 5 have only been available for 12 of the 47 games.
Of the 12 games they've all been available, they've played together in 4 of them.
10/23/19 vs PHI, 3.5 minutes, -1
10/25/19 vs TOR, 1.7 minutes, +2
12/28/19 vs TOR, 6.4 minutes, +9
1/9/2020 vs PHI, 1.0 minutes, -4
Total, 4 games, 12.6 minutes, +6
Interesting that it has only been used against 2 teams, both of which are considered big. But if history is any indicator, we'll see all 5 together on Saturday vs Philly.