Wikipedia says there were strikes in 1970 and 1974, neither of which affected league games, I was 15 in 1972 and have no memory of any NFL games cancelled as a result of any work stoppage.
Dear soCal,
I am so disappointed that anyone takes ‘wiki’ as gospel, ever since it was found out in recent years, that existing content was being tampered with by both sides in scrubbing details from the records, of any subject.
Now, for a reward of your diligence, I suggest you go to YouTube, and type “U-Tapao” in the search, and include the dash. There you will find what went on, during my three years there, starting when I was nary two years from high school graduation.