Murphy says he was pedaling on the road when an oncoming car didn't see him and suddenly made a right turn -- causing a bad accident at a relatively high rate of speed.

Murphy says he injured his head in the collision ... and was bleeding profusely. In fact, the 30-year-old says the wound was so bad -- he "nearly" bled out on the scene.

Thankfully, medical personnel eventually arrived and rushed Murphy to the hospital, where he ultimately survived and took a selfie from his bed.

"Im here still breathing for a greater purpose clearly 🙏🏾💫" Murphy said Wednesday in a social media post.

Of course, this is not the first time Murphy has defied death. The featherweight was shot in the face and neck after leaving a barbershop in the UK in 2013.

Murphy heroically battled back from those injuries -- and earned the nickname "The Miracle" in fighting circles.