A second woman just testified that ex-NFL star Kellen Winslow Jr. threatened to murder her while raping her in 2018 ... echoing allegations from another woman who testified yesterday.
The 58-year-old woman -- identified as Jane Doe 2 in court -- alleges Winslow picked her up on May 18, 2018 in the San Diego area in order to take her on a coffee date.
But instead of getting drinks at a nearby cafe ... she says Winslow pulled over on the side of the road in a remote area and raped her.
She claims during the act, he put his hands around her neck and said, "'If you scream,' I don't know if it was, 'I'll choke you to death' or 'I'll murder you.