I mean, sure, but RAPTOR isn’t telling you what you’re claiming it’s telling you. At this level of minutes, the error on RAPTOR is about ten percent.
DPM - a far less noisy stat - has Mobley as an average defender and below average offensive player ().
The Cavs on/off with Mobley is pretty significant (21 points per 100 possessions better with him off court), but a lot (not all) of that has to do with the fact that Love (+8 points per 100 possessions better with Love on court than off) and Cedi (+14 points per 100 possessions better with him on court than off) subbing on when Mobley subs out.
Mobley has not been that great this year, but a stat like RAPTOR that says he’s one of the worst NBA players, with a ten point margin for error this early on, isn’t what I’d look to for evidence.