In 1988, Valentine feuded with "The Rock" Don Muraco , who had turned face a year earlier. The feud was triggered when Valentine viciously attacked Muraco's manager, former WWF Heavyweight Champion Superstar Billy Graham . Graham, walking with a cane, tried to intervene when Valentine held the figure-four leglock on jobber Ricky Ataki, after already winning the match. Valentine then put the figure-four leglock on Graham, who had a plastic hip. The feud was abruptly halted when Muraco was dismissed by the WWF, despite Valentine's pleas for Muraco not to be fired so that the promising program could be allowed to run.  (Ironically, kayfabe magazine Inside Wrestling had run a story on the feud, claiming that it was Muraco, yearning to personally avenge Graham's injuries, who had begged the WWF not to dismiss Valentine.) 
I witnessed a lot of what is mentioned here during my twenty-plus years in Japan. But there is one story that will top even all of this. Daryl Spencer in 1965. Vying for the Triple Crown, he once went to bat holding his bat upside down in protest of being walked time and again. Also, Spencer was known for riding his minibike to and from the station nearest his home on his commute to the stadium. One day, eleven games from the end of the season, he was run into a wall by a small delivery van and had his leg broken. He did, of course, miss the remainder of the season. His Japanese competitor for the title, Katsuya Nomura, won the Triple Crown. Rumors were rampant about the accident being "not so accidental".