RJ Barrett had a 23.9 usage percentage in his rookie season in 2019-20.

rj barrett usage rate per year
2019-20Barrett2020-21Barrett2021-22Barrett2022-23Barrett23.923.427.625.9
NAMESEASONTMGPUSG%MPGPPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF+/-
RJ BarrettRJ Barrett2019-20
NYKNYK
5623.930.414.35.02.61.00.32.25.213.040.21.13.532.02.84.561.41,7048032791435517124122-325
RJ BarrettRJ Barrett2020-21
NYKNYK
7223.434.917.65.83.00.70.31.96.514.744.11.74.340.12.93.874.62,5111,2644142175320139188+137
RJ BarrettRJ Barrett2021-22
NYKNYK
7027.634.520.05.83.00.60.22.27.017.140.82.05.834.24.15.871.42,4171,4024082084316151142-146
RJ BarrettRJ Barrett2022-23
NYKNYK
3925.934.420.05.52.90.50.22.36.916.342.71.85.532.64.35.775.71,3417802131131869193+20
StatMuse has season-level data for usage percentage going back to the 1977-78 season.