["< sod > the'''north american junior soccer league'''('''nasl''') is a professional men's [ [ association football | soccer ] ] league with 12 teams : 10 in within the united states ( with 1 in puerto rico ) and 2 in canada. it is sanctioned by the [ [ united states soccer federation ] ] ( u. s. usa soccer ) as the division ii league in the [ [ united states soccer league system | american league system ] ], under [ [ major league soccer ] ] ( mls ) and above the [ [ united soccer league ] ] ( formerly, usl pro ). it is headquartered in [ [ new york city ] ]. < eod > < sod > the'''north american soccer league'''('''nasl''') is mainly a professional men's [ [ association football | soccer ] ] level league with 12 teams : 9 in the united states, 2 in canada and 1 in puerto rico. it is sanctioned by the [ [ united states soccer federation ] ] ( u. for s. soccer ) as the division ii league competing in the [ [ united states soccer league system | north american league system ] ], under [ [ major league soccer ] ] ( mls ) and above the [ [ united soccer league league ] ] ( formerly, usl pro ). it itself is headquartered in [ [ new york city ] ]. < eod >"]