As I remember it, and I could be wrong (shocking, huh?), in his law suit Walton claimed the team doctor (Robert Cook) was shooting up his legs and ankles and feet (or whatever) so he could play, against his wishes, which masked the symptoms of his injuries and led to his pretty catastrophic injuries. When the team countered that his Cocaine use contributed to masking the symptoms of his injuries, which contributed to the further injury, the suit was dropped, seemingly so he wouldn't incriminate himself. It appeared the team had him over a barrel, and he was pretty bitter about it. That could be totally wrong, but that's an IIRC.