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:     International Champions Cup (International C) (ID: 1a111) (Sort: League) (Playoffs: 1)
    Division: Group A                                       (ID: d133y) (Sort: Conf) (Playoffs: 1)
      Team:   Barcelona                                     (ID: t1h2t)
      Team:   Juventus                                      (ID: t1s8f)
      Team:   Manchester City                               (ID: t1s8g)
      Team:   Manchester United                             (ID: t1s8h)
      Team:   Paris Saint-Germain         (PSG)             (ID: t1h30)
      Team:   Real Madrid                                   (ID: t1m9t)
      Team:   Roma                                          (ID: t1s8i)
      Team:   Tottenham Hotspur                             (ID: t1s8j)
  Kind: pro
  Sport: soccer
  Gender: male
  Country: USA
  State: 
  Level: Z
  Season: 2017 (current: True)
  Author: Markus Paminger
  Note: 
  LotteryNote: 
LeagueEnd

SortBegin
Conf: Average Points, Average GoalsDelta, Average GoalsFor, Points
HeadToHead, DrawLots

League:least PositionInParent, Average Points, Average GoalsDelta, Average
GoalsFor, DrawLots
SortEnd

RulesBegin
  PointsForWinInRegulation:  3
  PointsForWinInOvertime:  3
  PointsForWinInShootout:  2
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  1
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0.25
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.5
  WeightType:  PythagenpatIgnoreShootOutWinningGoals
  WeightExponent:  1.4
  WhatDoYouCallATie:  draw
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  promoted
  Promote:  1
  PromotePlus:  0
  PromotePlusPercent:  0.5
  WhatDoYouCallDemoted:  relegated
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
7/19/17   Roma                1-2   PSG                 (ID: g1u1fz)
7/20/17   Manchester United   2-0   Manchester City     (ID: g1u1g0)
7/22/17   Juventus            1-2   Barcelona           (ID: g1u1g1)
7/22/17   PSG                 2-4   Tottenham Hotspur   (ID: g1u1g2)
7/23/17   Real Madrid         1-2   Manchester United   (ID: g1u1g3)
7/25/17   Tottenham Hotspur   2-3   Roma                (ID: g1u1g4)
7/26/17   Barcelona           1-0   Manchester United   (ID: g1u1g5)
7/26/17   Manchester City     4-1   Real Madrid         (ID: g1u1g6)
7/26/17   PSG                 2-3   Juventus            (ID: g1u1g7)
7/29/17   Manchester City     3-0   Tottenham Hotspur   (ID: g1u1g8)
7/29/17   Real Madrid         2-3   Barcelona           (ID: g1u1g9)
7/30/17   Roma                1-2   Juventus            (ID: g1u1ga)
GamesEnd