John McEnroe,Billy Jean King,Ozzie Smith,Rickey Henderson,Bob Gibson,Larry Bird, Magic Johnson,and Roger Staubach, to name a few.
Answer 2As you have placed this in Basketball, hockey and OZ footy categories, we need to refer mainly to those sports:
Larry Bird, Kareem Abdul in US basketball...
Len Thompson, John Greening, Wayne Richardson, Alex 'Jezza', Ian Stewart, Peter McKenna, Peter Hudson, etc in the early 70's in Australian football.
Brian Glencross and Ric Charlesworth in Australian hockey. Each of these went on to, later, coach Gold Medal winning Olympic hockey teams.
Both, Ric Charlesworth and Brian Glencross, were stars in Australian Field Hockey during the early 1970's. Each of these champions went on to later coach Olympic Gold performance hockey teams.
I am not sure on cyclists in the early 1970's, but top Australian footballers during those times included John Greening, John Nicholls, Alex Jesaulenko, Peter McKenna, Peter Hudson, Len Thompson, Ian Stewart, Ken Fletcher [father of Dustin].
Tom Brady
Boston Celtics
Probably "Love Story" (1970). Stars Ali MacGraw, Ryan O'Neal, Ray Milland.
well the 5 most popular sports in the 1970's are baseball, football, basketball, soccer, and last but not least hockey Football, baseball, basketball, track and Field, Swimming
Wayne gretzky ,david hellman
There are many sports who are popular late back 1970's like: Alpine Skiing, American Football, Artistic Gymnastic, Assocation Football to the last Yatc Racing. so in different countries, there's a lot of sport that are very popular.
Chad Reed. He is a dirt bike rider. He races in America now..
The most popular men's magazine today is Sports Illustrated which provides news, stats and interviews with today's top sports stars. Sports Illustrated is published once a week and offers subscription to its readers.
soccer, football, basketball, baseball and hockey.
Prince Sports was created in 1970.
Utah Stars was created in 1970.
Enchantress from the Stars was created in 1970.