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:     CONCACAF Gold Cup (Gold Cup) (ID: 1a10s) (Sort: League) (Playoffs: 8)
    Division: Group A                      (ID: d132p) (Sort: Conf) (Playoffs: 2)
      Team:   Canada                       (ID: t1gvx)
      Team:   Cuba                         (ID: t1xdn)
      Team:   Martinique                   (ID: t1s6k)
      Team:   Mexico                       (ID: t1gw5)
    Division: Group B                      (ID: d132q) (Sort: Conf) (Playoffs: 2)
      Team:   Bermuda                      (ID: t1xdm)
      Team:   Costa Rica                   (ID: t1gvy)
      Team:   Haiti                        (ID: t1xdp)
      Team:   Nicaragua                    (ID: t1s6m)
    Division: Group C                      (ID: d132r) (Sort: Conf) (Playoffs: 2)
      Team:   Curaçao                      (ID: t1s6i)
      Team:   El Salvador                  (ID: t1gw0)
      Team:   Honduras                     (ID: t1gw3)
      Team:   Jamaica                      (ID: t1gw4)
    Division: Group D                      (ID: d15p3) (Sort: Conf) (Playoffs: 2)
      Team:   Guyana                       (ID: t1xdx)
      Team:   Panama                       (ID: t1xdr)
      Team:   Trinidad and T               (ID: t1xds)
      Team:   United States                (ID: t1xdt)
  Kind: pro
  Sport: soccer
  Gender: male
  Country: CONCACAF
  State: 
  Level: 1
  Season: 2019 (current: True)
  Author: Markus Paminger
  Note: 
  LotteryNote: 
LeagueEnd

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

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

RulesBegin
  PointsForWinInRegulation:  3
  PointsForWinInOvertime:  3
  PointsForWinInShootout:  3
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  0
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0.25
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.5
  WeightType:  Pythagorean
  WeightExponent:  1.4
  WhatDoYouCallATie:  draw
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  Round of 8
  Promote:  8
  PromotePlus:  0
  PromotePlusPercent:  0.5
  WhatDoYouCallDemoted:  Eliminated
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
6/18/19   Canada           4-0   Martinique       (ID: g1z89r)
6/18/19   Costa Rica       4-0   Nicaragua        (ID: g1z89s)
6/18/19   Curaçao          0-1   El Salvador      (ID: g1z89v)
6/18/19   Haiti            2-1   Bermuda          (ID: g1z89t)
6/18/19   Jamaica          3-2   Honduras         (ID: g1z89w)
6/18/19   Mexico           7-0   Cuba             (ID: g1z89u)
6/18/19   Panama           2-0   Trinidad and T   (ID: g1z8a9)
6/18/19   United States    4-0   Guyana           (ID: g1z8mi)
6/22/19   Costa Rica       2-1   Bermuda          (ID: g1z89z)
6/22/19   Cuba             0-3   Martinique       (ID: g1z89x)
6/22/19   El Salvador      0-0   Jamaica          (ID: g1z8a1)
6/22/19   Guyana           2-4   Panama           (ID: g1z8mj)
6/22/19   Honduras         0-1   Curaçao          (ID: g1z8a2)
6/22/19   Mexico           3-1   Canada           (ID: g1z89y)
6/22/19   Nicaragua        0-2   Haiti            (ID: g1z8a0)
6/22/19   United States    6-0   Trinidad and T   (ID: g1z8aa)
6/26/19   Bermuda          2-0   Nicaragua        (ID: g1z8a5)
6/26/19   Canada           7-0   Cuba             (ID: g1z8a3)
6/26/19   Haiti            2-1   Costa Rica       (ID: g1z8a6)
6/26/19   Honduras         4-0   El Salvador      (ID: g1z8a7)
6/26/19   Jamaica          1-1   Curaçao          (ID: g1z8a8)
6/26/19   Martinique       2-3   Mexico           (ID: g1z8a4)
6/26/19   Panama           0-1   United States    (ID: g1z8ab)
6/26/19   Trinidad and T   1-1   Guyana           (ID: g1z8mk)
GamesEnd