The Cleveland Cavaliers had a net rating of 10.2 with LeBron James in 2008-09.

2009 cavs net rating with and without lebron james
2008-09Cavaliers10.2-1.1
with
without
TEAMSEASONWITH/WITHOUTGPNETMPGPPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF
Cleveland CavaliersCleveland Cavaliers2008-09with8110.2240.9100.242.320.27.25.311.936.778.646.88.020.339.218.724.775.819,5158,1133,4241,6375874309661,632
Cleveland CavaliersCleveland Cavaliers2008-09without1-1.1265.0110.036.026.06.05.016.046.089.051.710.024.041.78.012.066.72651103626651631