USWA Unified World Heavyweight Championship ended in 1997.
You don't play boxing, BUT that was the sport Ali was in. He started boxing at the age of 12 in 1954, he won the Olympic Light Heavyweight Championship in 1960 in Rome and then turned Pro. He won the Heavyweight Championship of the World 3 times and retired for good at the end of 1981.
World Championship Wrestling ended in 2001.
World Doubles Championship ended in 1987.
World Championship Tennis ended in 1990.
News of the World Championship ended in 1959.
Best of World Championship Wrestling ended in 1987.
World Championship Wrestling - Australia - ended in 1978.
World Class Championship Wrestling ended in 1990.
WCW Thunder ended on 2001-03-21.
WCW Main Event ended in 1998.
WCW Hall of Fame ended in 1996.