Stephen Curry has 5.7 rebounds per game in the NBA Finals in his career.

steph curry's rebounds per game percentage in the finals
NAMESERIESGPRPGMPGPPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF+/-
Stephen CurryStephen CurryNBA Finals285.739.426.56.21.50.43.88.419.942.04.311.238.55.45.992.71,102741160174431010578+103
StatMuse has game-level data for rebounds per game going back to the 1956 Finals.