What were the sports in 1950s?
I think you can answer that yourself, by asking "what new sports are there that have been invented since the 1950's. All the ones that were popular in the 50's are still popular. Baseball, Football, and Basketball were the big three. In America of course, Soccer has never been particularly popular, but has enjoyed a bit of success too. Nascar started in roughly, 1950, and has enjoyed a lot of success since. Other than that, I don't know what to tell you.
In the Northeastern US: Pro Sports: # 1 Baseball, #2 Football, #3 Basketball, a very distant #4 was Hockey (almost nobody cared about hockey). College Sports: # 1 Football, #2 Basketball, #3 Track & field, #4 Baseball, college hockey was not an issue in the 50's. High School Sports: Same as College except switch #3 and #4. Hockey:unheard of in High School.
Life was different, very different! The word 'Teenager' was born in the 1950s as kids were repealing from their parents, this was due to infulences like Elvis Presley, Marilyn monroe etc. Only the rich could afford a television so usually teens where more active, playing a lot of sports staying healthy. Also getting up to mischief which will never change regardless of what year it is.