NFL players have the shortest careers and the most injuries.
Their medical bills after playing can be astronomical.
The NFL has the highest revenue average per team of any sport in the world.
In the chart below:
Revenue average per team = Green.
Highest revenue of a single team = Yellow
The bottom number is the low revenue of a single team in that league.
So while in soccer, Manchester United generates 609 million dollars, on average the Premier League's teams earn 215 million -- significantly less than the average NFL team, 286 million. (These numbers are a few years old, but are largely accurate in terms of relation)
http://www.businessinsider.com/chart-nfl-mlb-premier-league-revenue-2014-5
The League Minimum salary in the NFL is $435,000.
Even if you have 10 years in the league, the minimum is only $970,000
https://www.spotrac.com/blog/nfl-minimum-salaries-for-2015-and-the-veteran-cap-benefit-rule/
This seems a bit silly considering how much money the league generates.
The League Minimum in MLB is $507,500.
http://www.truebluela.com/2014/11/20/7178067/mlb-minimum-salary-2015
In the NBA this year, it's $525,093.
http://basketball.realgm.com/nba/info/minimum_scale
In the NHL, it's $575,000.
http://www.puckreport.com/2009/07/nhl-minimum-wage-maximum-wage-by-year.html

Their medical bills after playing can be astronomical.
The NFL has the highest revenue average per team of any sport in the world.
In the chart below:
Revenue average per team = Green.
Highest revenue of a single team = Yellow
The bottom number is the low revenue of a single team in that league.
So while in soccer, Manchester United generates 609 million dollars, on average the Premier League's teams earn 215 million -- significantly less than the average NFL team, 286 million. (These numbers are a few years old, but are largely accurate in terms of relation)
http://www.businessinsider.com/chart-nfl-mlb-premier-league-revenue-2014-5
The League Minimum salary in the NFL is $435,000.
Even if you have 10 years in the league, the minimum is only $970,000
https://www.spotrac.com/blog/nfl-minimum-salaries-for-2015-and-the-veteran-cap-benefit-rule/
This seems a bit silly considering how much money the league generates.
The League Minimum in MLB is $507,500.
http://www.truebluela.com/2014/11/20/7178067/mlb-minimum-salary-2015
In the NBA this year, it's $525,093.
http://basketball.realgm.com/nba/info/minimum_scale
In the NHL, it's $575,000.
http://www.puckreport.com/2009/07/nhl-minimum-wage-maximum-wage-by-year.html
