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: Cascadia Cup  (ID: 1aft) (Sort: Div) (Playoffs: 1)
    Team: Sounders      (ID: t17mi)
    Team: Timbers       (ID: t17mj)
    Team: Whitecaps     (ID: t17mk)
  Kind: pro
  Sport: soccer
  Gender: male
  Country: USA
  State: 
  Level: S
  Season: 2019 (current: True)
  Author: 
  Note: 
  LotteryNote: 
LeagueEnd

SortBegin
Div: Points, Points HeadToHead, GoalsDelta HeadToHead, GoalsFor
HeadToHead, GoalsDelta, GoalsFor
SortEnd

RulesBegin
  PointsForWinInRegulation:  3
  PointsForWinInOvertime:  3
  PointsForWinInShootout:  3
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  0
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0.258
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.667
  WeightType:  Pythagorean
  WeightExponent:  1.4
  WhatDoYouCallATie:  draw
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  Cascadia Cup Champion
  Promote:  0
  PromotePlus:  0
  PromotePlusPercent:  0
  WhatDoYouCallDemoted:  did not advance
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
3/30/19   Whitecaps   0-0   Sounders    (ID: g1yk50)
5/10/19   Whitecaps   1-0   Timbers     (ID: g1yk51)
6/29/19   Sounders    1-0   Whitecaps   (ID: g1yk52)
7/21/19   Sounders    1-2   Timbers     (ID: g1yk53)
8/10/19   Timbers     3-1   Whitecaps   (ID: g1yk54)
8/23/19   Timbers           Sounders    (ID: g1yk55)
GamesEnd