Major League Baseball teams play 162 games a year. It’s simply not possible in American football to go beyond 16-20 games. As it is, average career spams are only a couple of years. Add in more tournaments and champions and you would be lucky to have your team for a full season.
American football players don’t want to play “friendly” matches. It’s an unnecessary risk. As it is, they hate playing in their one annual all-star game, the Pro Bowl. That’s usually the worst game of the year because the NFL’s best players don’t want to risk injury for a game that doesn’t count.
American fans don’t care to see their teams compete for lesser championships and titles. Americans often get criticized for referring to league champions as “world champions,” but that reflects a reality about the American attitude. There’s only ONE award that counts.
And if any major American League instituted relegation, you can bet blood would be spilled in the commissioner’s office. Fans would eat him alive.
Also, no team would agree to a relegation system. Remember, the teams own the league.
It evolved by itself gradually through free market forces. Remember, there’s no Ministry of Sport or government-sponsored regulatory body.
In the late 19th and early 20th centuries there were all kinds of systems—leagues controlled by players, associations that any team was welcome to join, independent “barnstorming” teams.
It was the creation of the National League of Base Ball Clubs in 1876 that established the successful model of a league owned by the owners of the member clubs, which decided as an exclusive group who was in and who was out. And no one was going to vote himself out.
The NFL grew out of the most successful old-style football league, the Ohio League, (whose most successful clubs were the Massillon Tigers and the Canton Bulldogs).
The franchise model that the NFL adopted from baseball produced the most popular competitions. Over time, the NFL added all the other elements of parity, revenue-sharing, salary caps, the draft, etc., all adding up to America’s most popular sport today.
American sports have more advertising than aist any other human endeavor. Thank Ig we still ban advertising on player uniforms (kit).
American football is heavily dependent on rules and rulings by officials. If they didn’t explain what was happening, spectators literally would not understand what was happening in front of them.