MLS Expansion Through The Years (1996-2021)
Sports Team History, Latest Sports Team History News
Comparing youth leagues in the wake of the DA's demise 12/14/2020
USL: League announces intention to house all 24 teams in soccer-specific stadiums by 2020
LAFC Academy To Participate In MLS NEXT
48 Team MLS in Map Form. : r/MLS
USL Championship Map, Teams
A closer look at the next possible MLS expansion markets - SBI Soccer
MLS names five candidiate cities for expansion
File:Map of Cities in the USA and Canada with MLB, MLS, NBA, NFL or NHL Teams.png - Wikipedia
40 maps and charts that explain sports in America
MLS franchise map (not yet a nationwide league)