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: Don Bosco FFL            (ID: 1a1n5) (Sort: League) (Playoffs: 4)
    Team: Butt Stuff;)      (BS)   (ID: t1t6b)
    Team: Cabbage Ravagers  (CABB) (ID: t1t6c)
    Team: Team Vella        (CV)   (ID: t1t6d)
    Team: The Grim Greeker  (GG)   (ID: t1t6e)
    Team: Hillside Invaders (HIVS) (ID: t1t6f)
    Team: Infinite Stratos  (INFI) (ID: t1t6g)
    Team: Jew Brees         (JEWS) (ID: t1t6h)
    Team: Jimbob Freemans   (JF)   (ID: t1t6i)
    Team: Team Skae         (SKAE) (ID: t1t6j)
    Team: Mark TurtwIngram  (TWIG) (ID: t1t6k)
  Kind: rec
  Sport: football
  Gender: male
  Country: USA
  State: 
  Level: A
  Season: 2017 (current: True)
  Author: nobody
  Note: 
  LotteryNote: These words are an illusion.
LeagueEnd

SortBegin
League:  Points, Average Points HeadToHead, DrawLots
SortEnd

RulesBegin
  PointsForWinInRegulation:  1
  PointsForWinInOvertime:  1
  PointsForWinInShootout:  1
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  0
  PointsForTie:  0.1
  PercentOfGamesThatEndInTie:  0.0001
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.5
  WeightType:  PercentOfPointsWon
  WeightExponent:  15
  WhatDoYouCallATie:  tie
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  promoted
  Promote:  0
  PromotePlus:  0
  PromotePlusPercent:  0
  WhatDoYouCallDemoted:  relegated
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
9/7/17     BS     139.8-110.9   CV     (ID: g1uzh9)
9/7/17     CABB   106.3-93.7    HIVS   (ID: g1uzha)
9/7/17     JF     73.7-122.9    JEWS   (ID: g1uzhb)
9/7/17     SKAE   97.6-93.9     GG     (ID: g1uzhc)
9/7/17     TWIG   85.6-119      INFI   (ID: g1uzhd)
9/14/17    GG     85.4-109.9    CV     (ID: g1uzhe)
9/14/17    INFI   148.1-134.3   CABB   (ID: g1uzhf)
9/14/17    JEWS   144.6-119.5   HIVS   (ID: g1uzhg)
9/14/17    SKAE   80.4-99.6     JF     (ID: g1uzhh)
9/14/17    TWIG   83.5-104.1    BS     (ID: g1uzhi)
9/21/17    BS     141.4-167.4   CABB   (ID: g1uzhj)
9/21/17    CV     110.5-92.9    SKAE   (ID: g1uzhk)
9/21/17    GG     132.5-136.2   TWIG   (ID: g1uzhm)
9/21/17    HIVS   89.6-107.8    JF     (ID: g1uzhn)
9/21/17    JEWS   149-78.4      INFI   (ID: g1uzhp)
9/28/17    BS     119.7-99.5    GG     (ID: g1uzhq)
9/28/17    CABB   130.9-102.8   JEWS   (ID: g1uzhr)
9/28/17    CV     87.1-93.3     HIVS   (ID: g1uzhs)
9/28/17    JF     88.8-86       INFI   (ID: g1uzht)
9/28/17    SKAE   135.2-120.2   TWIG   (ID: g1uzhu)
10/5/17    GG     80.1-124.8    JEWS   (ID: g1uzhv)
10/5/17    INFI   113.1-86.1    HIVS   (ID: g1uzhw)
10/5/17    JF     127-100.8     CABB   (ID: g1uzhx)
10/5/17    SKAE   110.7-133.2   BS     (ID: g1uzhy)
10/5/17    TWIG   108.5-106.2   CV     (ID: g1uzhz)
10/12/17   CABB   155-93        SKAE   (ID: g1uzi0)
10/12/17   HIVS   70.8-91       BS     (ID: g1uzi1)
10/12/17   INFI   136.9-127.9   GG     (ID: g1uzi2)
10/12/17   JEWS   118.3-121.3   CV     (ID: g1uzi3)
10/12/17   JF     89.7-125.7    TWIG   (ID: g1uzi4)
10/19/17   BS     95.2-115.1    JEWS   (ID: g1uzi5)
10/19/17   CV     165.1-86.8    INFI   (ID: g1uzi6)
10/19/17   GG     132.6-46.6    JF     (ID: g1uzi7)
10/19/17   SKAE   112.9-120.9   HIVS   (ID: g1uzi8)
10/19/17   TWIG   114.6-132.7   CABB   (ID: g1uzi9)
10/26/17   CABB   119.7-110.8   GG     (ID: g1uzia)
10/26/17   HIVS   86.3-101.7    TWIG   (ID: g1uzib)
10/26/17   INFI   115.7-129.5   BS     (ID: g1uzic)
10/26/17   JEWS   53.3-120.3    SKAE   (ID: g1uzid)
10/26/17   JF     115-114.1     CV     (ID: g1uzie)
11/2/17    CABB   140.5-116.7   JF     (ID: g1uzif)
11/2/17    CV     122-67        BS     (ID: g1uzig)
11/2/17    GG     97.1-65.1     SKAE   (ID: g1uzih)
11/2/17    HIVS   141.6-110.4   INFI   (ID: g1uzii)
11/2/17    TWIG   90-107.2      JEWS   (ID: g1uzij)
11/9/17    BS     95.1-112.7    TWIG   (ID: g1uzik)
11/9/17    CV     115.2-94.8    GG     (ID: g1uzim)
11/9/17    HIVS   156.6-84.9    CABB   (ID: g1uzin)
11/9/17    JEWS   104.8-120.3   JF     (ID: g1uzip)
11/9/17    SKAE   102.1-129.3   INFI   (ID: g1uziq)
11/16/17   BS     128.2-117     JF     (ID: g1uzir)
11/16/17   CABB   173-92.3      INFI   (ID: g1uzis)
11/16/17   HIVS   97.8-63.3     JEWS   (ID: g1uzit)
11/16/17   SKAE   97.7-101.4    CV     (ID: g1uziu)
11/16/17   TWIG   135-105.9     GG     (ID: g1uziv)
11/23/17   CV     134-168.3     CABB   (ID: g1uziw)
11/23/17   GG     49.7-118.1    BS     (ID: g1uzix)
11/23/17   INFI   106.2-110.5   JEWS   (ID: g1uziy)
11/23/17   JF     149.4-139.9   HIVS   (ID: g1uziz)
11/23/17   TWIG   91.2-102.7    SKAE   (ID: g1uzj0)
11/30/17   BS                   SKAE   (ID: g1uzj1)
11/30/17   CV                   TWIG   (ID: g1uzj2)
11/30/17   GG                   HIVS   (ID: g1uzj3)
11/30/17   INFI                 JF     (ID: g1uzj4)
11/30/17   JEWS                 CABB   (ID: g1uzj5)
GamesEnd