Least efficient players in the NBA this season averaging at least 15ppg: Terry Rozier (46.7% TS), RJ Barrett (49.1% TS), Cade Cunningham (49.2% TS), Dillon Brooks (49.2% TS), Russell Westbrook (49.6% TS)

Here is the entire bottom 10

Rk	Player	PTS	TS%
1	Terry Rozier	20.5	.467
2	RJ Barrett	18.4	.491
3	Cade Cunningham	19.9	.492
4	Dillon Brooks	17.3	.492
5	Russell Westbrook	15.0	.496
6	CJ McCollum	18.7	.497
7	Jamal Murray	16.4	.499
8	Kevin Porter Jr.	19.3	.519
9	Cole Anthony	15.5	.520
10	Jaden Ivey	16.2	.520

Source