Ex-NFL star Dana Stubblefield spent nearly a month in jail in connection to his rape case -- but he was released this weekend on a $500,000 bond ... TMZ Sports has learned. 47-year-old Stubblefield was first arrested back in May 2016 for allegedly raping a mentally disabled woman. He was hit with 5 felonies. Bail was initially set at $250k. He immediately posted it and was released. But in January 2018, prosecutors uncovered evidence they believe proves Stubblefield used a gun to commit the alleged rape. Bail was revoked and he was remanded back into custody on Jan. 19. He spent the next several weeks locked up in Santa Clara County Jail.