You can add leagues, big or small, to Sports Club Stats.
   It's free.
   It's easy.
   Just email import@sportsclubstats.com the:
      structure
      schedule
      and rules
   In a few minutes you'll get back a link to the league.
   Play around, have fun, you won't break anything.
   I look forward to seeing what you create.

Info about the various settings:
   https://docs.google.com/document/d/1-UneDNk6tkOrc_B-WBnGnc5KGiy2kttXC2fW8dR7QzM/edit?hl=en

For example, here is what created this league:

LeagueBegin
  League:       Taca Guanabara                                 (ID: 1a1rg) (Sort: Div)
    Conference: Grupo B                                        (ID: d13p0) (Sort: Div) (Playoffs: 2)
      Team:     Boavista Sport Club            (Boavista)      (ID: t16dr)
      Team:     Botafogo de Futebol e Regatas  (Botafogo)      (ID: t11hg)
      Team:     Clube de Regatas do Flamengo   (Flamengo)      (ID: t11hk)
      Team:     Macae Esporte Futebol Clube    (Macae)         (ID: t16p0)
      Team:     Madureira Esporte Clube        (Madureira)     (ID: t16dy)
      Team:     Nova Iguacu Futebol Clube      (Nova Iguacu)   (ID: t16dz)
    Conference: Grupo C                                        (ID: d13p1) (Sort: Div) (Playoffs: 2)
      Team:     Bangu Atletico Clube           (Bangu)         (ID: t16dq)
      Team:     Fluminense Football Club       (Fluminense)    (ID: t11hm)
      Team:     Associacao Atletica Portuguesa (Portuguesa)    (ID: t16dv)
      Team:     Resende Futebol Clube          (Resende)       (ID: t16e2)
      Team:     Club de Regatas Vasco da Gama  (Vasco da Gama) (ID: t11i2)
      Team:     Volta Redonda Futebol Clube    (Volta Redonda) (ID: t16e4)
  Kind: pro
  Sport: soccer
  Gender: male
  Country: Brazil
  State: Rio de Janeiro
  Level: A
  Season: 2017 (current: False)
  Author: Marcos Vilhena
  Note: 
  LotteryNote: 
LeagueEnd

SortBegin
Div: Points, Wins, GoalsDelta, GoalsFor, Points HeadToHead, GoalsDelta
HeadToHead, GoalsFor HeadToHead, DrawLots
Conf: MoveClinchedToFrontBySeed, Points, Wins, GoalsDelta, GoalsFor, Points
HeadToHead, GoalsDelta HeadToHead, GoalsFor HeadToHead, DrawLots
SortEnd

RulesBegin
  PointsForWinInRegulation:  3
  PointsForWinInOvertime:  3
  PointsForWinInShootout:  3
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  0
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0.24
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.52
  WeightType:  Pythagorean
  WeightExponent:  1.4
  WhatDoYouCallATie:  draw
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  promoted
  Promote:  0
  PromotePlus:  0
  PromotePlusPercent:  0
  WhatDoYouCallDemoted:  relegated
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
1/25/17   4:30 PM   Madureira       2-0   Botafogo        (ID: g1w0c2)
1/28/17   4:30 PM   Resende         2-2   Volta Redonda   (ID: g1w0c3)
1/28/17   5:00 PM   Botafogo        1-1   Nova Iguacu     (ID: g1w0c4)
1/28/17   7:30 PM   Flamengo        4-1   Boavista        (ID: g1w0c5)
1/29/17   4:30 PM   Bangu           2-2   Portuguesa      (ID: g1w0c6)
1/29/17   5:00 PM   Vasco da Gama   0-3   Fluminense      (ID: g1w0c7)
1/29/17   8:30 PM   Macae           1-2   Madureira       (ID: g1w0c8)
2/1/17    4:30 PM   Boavista        1-1   Nova Iguacu     (ID: g1w0c9)
2/1/17    4:30 PM   Fluminense      1-0   Resende         (ID: g1w0ca)
2/1/17    7:30 PM   Flamengo        3-0   Macae           (ID: g1w0cb)
2/2/17    4:30 PM   Bangu           1-3   Vasco da Gama   (ID: g1w0cc)
2/2/17    7:30 PM   Volta Redonda   3-3   Portuguesa      (ID: g1w0cd)
2/4/17    4:30 PM   Boavista        0-1   Madureira       (ID: g1w0ce)
2/4/17    4:30 PM   Nova Iguacu     0-4   Flamengo        (ID: g1w0cf)
2/4/17    7:30 PM   Botafogo        2-1   Macae           (ID: g1w0cg)
2/5/17    4:00 PM   Vasco da Gama   2-1   Resende         (ID: g1w0ch)
2/5/17    7:30 PM   Portuguesa      0-3   Fluminense      (ID: g1w0ci)
2/6/17    8:00 PM   Volta Redonda   1-1   Bangu           (ID: g1w0cj)
2/11/17   4:30 PM   Madureira       0-0   Nova Iguacu     (ID: g1w0ck)
2/11/17   6:30 PM   Macae           0-2   Boavista        (ID: g1w0cm)
2/12/17   4:00 PM   Fluminense      4-0   Bangu           (ID: g1w0cn)
2/12/17   4:30 PM   Portuguesa      0-2   Resende         (ID: g1w0cp)
2/12/17   6:30 PM   Botafogo        1-2   Flamengo        (ID: g1w0cq)
2/12/17   7:30 PM   Volta Redonda   1-0   Vasco da Gama   (ID: g1w0cr)
2/18/17   4:30 PM   Fluminense      3-0   Volta Redonda   (ID: g1w0cs)
2/18/17   4:30 PM   Nova Iguacu     3-1   Macae           (ID: g1w0ct)
2/18/17   4:30 PM   Resende         0-1   Bangu           (ID: g1w0cu)
2/18/17   4:30 PM   Vasco da Gama   1-0   Portuguesa      (ID: g1w0cv)
2/19/17   5:00 PM   Boavista        2-3   Botafogo        (ID: g1w0cw)
2/19/17   5:00 PM   Flamengo        4-0   Madureira       (ID: g1w0cx)
GamesEnd