6/11 11:26 AM PT -- The judge has declared a mistrial on the remaining 8 charges ... saying the jury was deadlocked and unable to reach a verdict.
It's unclear if prosecutors intend to retry the case.
Ex-NFL star Kellen Winslow Jr. has just been found GUILTY of forcible rape -- along with lewd conduct and indecent exposure -- and he's now facing serious prison time.
A jury deliberated in a San Diego courthouse for the past week before reaching a verdict Monday on 4 of the 12 counts he's facing ... finding Winslow guilty on 3 of the 4, including the forcible rape of 58-year-old Jane Doe #2.
He was also found guilty of indecent exposure to Jane Doe #3 and guilty of lewd conduct regarding Jane Doe #5.
He was found NOT GUILTY on a second lewd conduct charge regarding Jane Doe #5.