Kellen Winslow Jr. has pled guilty to raping an unconscious 17-year-old girl back during a 2003 incident and now faces up to 18 years in prison.
The ex-NFL star cut a plea deal with prosecutors in his serial rape case involving 5 different accusers -- several of them older transients.
Back in June, Winslow was convicted on 4 criminal charges ... but the jury was deadlocked on 8 remaining charges.
Winslow was due back in a San Diego court Monday for a retrial on the 8 remaining counts but cut a plea deal minutes ago in which he pled guilty to 2 counts -- sexual battery and rape of unconscious person.
In exchange for his plea, the remaining 6 charges were dropped -- which is a big deal for Kellen because he was facing a LIFE sentence if convicted on those 6 counts.
Instead, he's only facing between 12 and 18 years in prison. A sentencing hearing is scheduled for February 19.
As for Monday's 2 guilty pleas -- the sexual battery involves Jane Doe #1, a 54-year-old woman who claims Winslow raped her in his Jeep in 2018.
The other count, rape of an unconscious person, involved Jane Doe #4 who claimed Winslow raped her at a party in 2003 when she was 17 and he was 19.