Rapper Nelly

Flesh-n-Bone is proudly sober these days, and wants his fellow rappers to follow suit, which is why he's sending Nelly a message ... just in case his recent ...

which is also [died](https://www.tmz.com/2023/01/01/three-6-mafia-gangsta-boo-dead-dies/) on New Year's Day at 43 and cops are investigating a possible overdose, something Flesh says is 100% preventable in hip hop, going forward. [suspected to be OD-related](https://www.tmz.com/2023/01/01/three-6-mafia-gangsta-boo-dead-dies/). He calls it a necessary change ... just in case his recent show was fueled by illicit substances. [Flesh-n-Bone](https://www.tmz.com/people/flesh-n-bone/) is proudly sober these days, and wants his fellow rappers to follow suit, which is why he's sending [Nelly](https://www.tmz.com/people/nelly/) a message ...