leaguestringrequired
League identifier.
Possible values: nba, nfl, mlb, nhl, wnba, college-football, mens-college-basketball, womens-college-basketball, college-baseball, college-softball, eng.1, esp.1, ger.1, ita.1, ita.2, fra.1, usa.1, uefa.champions, uefa.europa, ufc, f1, nascar, nll, mlc
