Joseph Simmons, Jr. -- son of rap legend Rev Run -- just pled guilty to one charge of disorderly conduct in New York after being busted last May for marijuana possession. As part of the plea, the 19-year-old's possession charge was dropped -- <span style="font-weight: bold">he'll only have to serve one day of community service.</span> That's gotta hurt.
Law enforcement sources tell TMZ the 19-year old was seen allegedly buying the marijuana and rolling a joint while sitting in a car on Manhattan's Upper West Side. <span style="font-weight: bold">We're told he tried to get away by throwing his car into reverse, and nearly backed into the officer's car.</span>
Simmons Jr, known as JoJo on the MTV reality show "Run's House," <span style="font-weight: bold">was also booked for resisting arrest, attempted reckless endangerment, and criminal use of drug paraphernalia</span>.