The phrase "entire league" refers to all the teams or individuals competing in a specific sport or activity, including every player, coach, and other participants. Full definition
And, of course, one could spend dozens of hours creating teams and even entire leagues from scratch. (darkstation.com)
but ive heard: zagreb are unbeaten in 11 months - they have only 9 other teams in there entire league lol there biggest rivals - rijeka an hajduk split double lol (justarsenal.com)
For a sport based on teamwork and solidarity between players, the virus of match - fixing can easily be inculcated and spread from team to team, slowly poisoning entire leagues. (politics.co.uk)