The National Basketball Association (NBA) is a men's professional basketball league in North America; composed of 30 teams. It is widely considered to be the premier men's professional basketball league in the world. The NBA is an active member of USA Basketball (USAB), which is recognized by FIBA as the national governing body for basketball in the United States. The NBA is one of the four major professional sports leagues in the United States and Canada. NBA players are the world's best paid athletes by average annual salary per player.