The Boston Celtics had an offensive rating of 111.8 without Larry Bird in 1988-89.

celtics offensive rating without larry bird in the 1989 season
TEAMSEASONGPORTGMPGPPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF
Boston CelticsBoston Celtics1988-8976111.8241.0109.644.126.67.95.015.943.087.149.41.03.925.822.528.678.618,3158,3263,3482,0236023821,2121,731
StatMuse has team, game-level data for offensive rating going back to the 1983-84 season.