Colorado, was supposed to host the '76 games, but voters rejected a plan to finance the venues needed and the IOC chose Innsbruck instead; the city had already had venues from hosting the 1964 Winter Olympics. By year 1979 in sports – Sugar Ray Leonard wins his first world boxing title. 1978 in sports – First Ironman Triathlon. Johan Cruyff pulls out of the World Cup for personal reasons. Affirmed becomes the 11th thoroughbred to win the U.S. Triple Crown.1977 in sports – Pelé plays the last game of his professional career in a friendly between the New York Cosmos and Santos FC; Red Rum wins third Grand National.1976 in sports – Nadia Comăneci earns the first perfect score in the history of Olympic gymnastics. Super Bowl X saw the Pittsburgh Steelers repeat as world champions.1975 in sports – First Cricket World Cup; Muhammad Ali beat Joe Frazier in the Thrilla In Manila; Pele came out of retirement to play for the New York Cosmos and brought U.S. Soccer into American mainstream.1974 in sports – The Rumble in the Jungle boxing match; Gerd "der Bomber" Müller scores his 14th World Cup goal, a then record, as West Germany win the World Cup; Hank Aaron breaks Babe Ruth's career home run record1973 in sports – Ajax win third consecutive European Cup; Secretariat wins the Triple Crown of United States Thoroughbred Racing; "Battle of the Sexes" tennis match between Billie Jean King and Bobby Riggs. 1972 in sports – USSR beat USA in last second of the Olympic basketball final; Israeli athletes killed by Palestinian terrorists at the same Olympics; Canada defeats U.S.S.R. in Summit Series - Paul Henderson scores winning goal.1971 in sports – Richard Petty wins the Daytona 500 and the NASCAR Championship; Second Ibrox disaster. 1971 Springbok tour causes protest all over Australia; British and Irish Lions defeat All Blacks for the first time in a series.1970 in sports''' – Nijinsky II won the Triple Crown of British Thoroughbred Racing. The Marshall University football team is killed in a plane crash. The National and American Football Leagues merge to become one 26-team mega-league; Muhammad Ali returns to boxing after a three and a half year exile for refusing to go to fight in the Vietnam War to fight and defeat Jerry Quarry by a third round TKO.