NFL superstar Stefon Diggs just filed a lawsuit against a former fling ... accusing her of assaulting him, threatening to torpedo his career and attempting to extort millions of dollars out of him.
The Houston Texans receiver filed the papers this week ... claiming model and TV personality Mulan Hernandez -- who he had a "casual relationship" with for months -- showed up at his apartment around 6 AM on June 7, 2024 after a night of partying and proceeded to "aggressively berate" him.