Because it's seen as the most prestigious league in the world. It is also officially Barclay's Premier League or the English Premier League and is just shortened to plain premier league.
It has to be the English Premier League.
the premier league started in 1991. However before that it was called the English championship. the player who has the most English premier league appearances is Welsh and Manchester United winger Ryan Giggs.
Man Utd have won the Premier League 11 times. They have won 18 (including premier league)English League and Cups Altogether.
The Liverpool manager Rafael Benitez has tinkered the most with his players this season.
A total of 1,178 foreign born players have played in the Premier League, most of them Internationals with their home National Team. Far to many to list.