He was on the Lakers last season, right? He played well (or at least put up respectable numbers) in about 26 min/game. Not sure why the the Lakers wouldn't still be able to use him. This seems to me like a leak to try and make it seem like someone else is interested so that the Lakers will actually sign him. It could be true, it would make sense for the Celtics to have interest, but it seems unlikely to me he would end up in Boston.
A min salary for him is $2,905,851. That is not a small number even for someone who has made as much as him ($262,523,093 in 19 seasons if you are interested).