Ex-NFL star Dana Stubblefield says he's NO RAPIST -- claiming the allegations he sexually assaulted a mentally disabled woman are "false and fraudulent."
As we previously reported, the former 49ers superstar was charged with 5 felonies -- after prosecutors say he raped a woman he found on a babysitting website and had invited to his home for a job interview.
But Stubblefield is adamant the sex was consensual -- and he claims he can prove it ... with a lie detector test.
In fact, Stubblefield's lawyer Ken Rosenfield says he's already provided the District Attorney's office "with professional lie detector results that clearly show the encounter was consensual.