MLB - No Salary Cap, NFL - Worst to FIrst stories all the time, NHL - JUst about every team makes the playoffs.
NBA - Hardest to do. If it was so easy, there would be more variety of champions in the last 30 years.
This question is really answered. It's the NBA and there is no stat to show that it isn't.
Having only 8 different teams win in the last 30 years just shows that there isn't much parity. There's so much wrong with this I don't even know where to start.
MLB- No salary cap, thus meaning every team can spend as much as they want. Doesn't mean it's easy to win. When you play 162 games and only 4 teams from each league make the playoffs, nowhere close to being easiest.
NHL- 16 teams make the playoffs--same amount as the NBA. To win the Stanley Cup, you need a lot of things to bounce your way, puck included. Not easy by a long shot.
NFL- One and done, so one bad game and you're out.
NBA- Look at the Heat. Bought a championship this year. Lakers have done the same in the past few years, Boston did as well. NBA is the easiest of the four and it's not even close.