4:10 PM PT -- Officials say Winslow is being charged with 9 criminal charges including kidnapping with intent to commit rape, forcible rape, forcible sodomy, burglary, indecent exposure and more.

Here are the charges in total:

-- 2 counts of kidnapping with intent to commit rape
-- 2 counts of forcible rape
-- 1 count of forcible sodomy
-- 1 count of forcible oral copulation
-- 2 counts of residential burglary
-- 1 count of indecent exposure.

If convicted on all charges, he faces LIFE in prison.

Officials tell TMZ Sports ... Winslow was arrested by the Sheriff's Major Crimes Division at 1:05 PM on Thursday.

He's being booked into custody at the Vista Detention Facility -- a county jail in San Diego.

Officials say a search warrant has been executed for Kellen's home.

Ex-NFL star Kellen Winslow Jr. was arrested in San Diego -- again ... this according to the San Diego County District Attorney.

Details surrounding the arrest are unclear but law enforcement sources tell us Winslow is facing multiple criminal charges.

We don't know if this has anything to do with his arrest last week when he was accused of breaking into a home in a mobile home park in the San Diego area. For that incident, he was arrested for felony burglary.

But moments ago, the San Diego D.A. told TMZ Sports ... "A warrant was issued this morning for Kellen Winslow II’s arrest and he was taken into custody by San Diego Sheriff’s Deputies Thursday afternoon."

"Arraignment is anticipated Friday, June 15 ... Charges will be announced at that time."

We've reached out to Kellen's camp for comment -- so far, no word back.