Jackson suffered a dislocated hip following a tackle. In the film You Don't Know Bo, Jackson claimed that after he discovered the injury, he physically popped his hip back into the socket and in the process damaged the blood vessels supplying blood to the area.[44] While doctors did not find proof that Jackson physically reset his hip, they did discover that there was a fracture of one of Jackson's hip bones.

Within a month of the injury, Jackson had been diagnosed with avascular necrosis of the hip joint. He also was found to have lost all of the cartilage supporting his hip.[45] He would be forced to retire from football.

-Wikipedia