Ex-NFL running back Clinton Portis has just been ordered to spend 6 months in prison ... after pleading guilty to defrauding a plan designed to help retired players pay for medical bills.
Portis -- who pled guilty in the case back in September after reaching a deal with prosecutors -- was sentenced Thursday, TMZ Sports has confirmed.
In addition to the 6 months behind bars, the sentence also tacked on 6 months of home confinement. Portis also got 3 years of probation.
According to court docs, Portis must report to prison on March 8.