US rapper The Game began his jail sentence yesterday (March 3) at the Twin Towers correctional facility in Los Angeles.
The star received a 60-day sentence earlier this year for weapons offences.
The jail term follows an incident last February when the rapper was accused of pulling a gun on fellow basketball player Rodrick Shannon during a charity match at the Rita Walters Educational Complex.
The court heard that after a heated exchange on the court The Game went to his car, retrieved a firearm, then threatened Shannon with it, reports BBC News.
He was found guilty of possessing a gun on a school premises last month.